{
    "lazyNodes": false,
    "abFitnotesFlag": false,
    "abCrawlReviews": false,
    "productOptionsCookie": false,
    "orderDelayFlag": false,
    "skipSessionCookie": false,
    "covidMessage": false,
    "fullTitleCookie": false,
    "nrLoggerCookie": false,
    "checkoutReviewCookie": false,
    "productOptionSeqCookie": false,
    "maintenanceFlag": false,
    "bufferETACookie": false,
    "multiShippingDiscountFlag": false,
    "newFitmentFlag": false,
    "surveyOptInFlag": false,
    "crossSellFlag": false,
    "skuMappingFlag": false,
    "paySplitCookie": false,
    "callDisableFlag": false,
    "zipPaymentFlag": "u",
    "hassleFreeReturn": false,
    "lifetimeReplacement": false,
    "cpn_off": false
}
2012 Ram 2500

2012 Ram 2500 Exhaust Systems

Refine by:

Shop Catalog

Showing 1 - 15 of 15 results
Sort by:
Cat-Back, Exhaust System, 8 Cyl 5.7L, 76.3 in. Bed, Standard Cab Pickup, Rear Wheel Drive, Made of Aluminized Steel, Installer Series -
Part Number: M79S5148AL
Guaranteed to Fit
$384.99
Vehicle Fitment
  • 2012 Ram 2500 Laramie 8 Cyl 5.7L 98.3 in. Bed, Crew Cab Pickup, Rear Wheel Drive
  • 2012 Ram 2500 Power Wagon 8 Cyl 5.7L 76.3 in. Bed, Crew Cab Pickup, Four Wheel Drive
  • 2012 Ram 2500 Laramie Longhorn 8 Cyl 5.7L 76.3 in. Bed, Crew Cab Pickup, Rear Wheel Drive
  • 2012 Ram 2500 SLT 8 Cyl 5.7L 98.3 in. Bed, Standard Cab Pickup, Four Wheel Drive
  • 2012 Ram 2500 ST 8 Cyl 5.7L 98.3 in. Bed, Standard Cab Pickup, Rear Wheel Drive
Product Details
Material : Made of Aluminized SteelSystem Type : Cat-BackQuantity Sold : KitWarranty : MBRP 3-year Limited WarrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Installer SeriesExit Location : Exit: After Rear Tire (Passenger Side)Main Piping Diameter : 3 in. Main PipeRecommended Use : OE UpgradeProduct Fit : Direct Fit
Cat-Back, Exhaust System, 5.7L, 98.3 in. Bed, Extended Crew Cab Pickup, Four Wheel Drive, Made of Aluminized Steel, Performance Series -
Part Number: M79S5148P
Guaranteed to Fit
$359.99
Vehicle Fitment
  • 2012 Ram 2500 Laramie 8 Cyl 5.7L 98.3 in. Bed, Crew Cab Pickup, Rear Wheel Drive
  • 2012 Ram 2500 Power Wagon 8 Cyl 5.7L 76.3 in. Bed, Crew Cab Pickup, Four Wheel Drive
  • 2012 Ram 2500 Laramie Longhorn 8 Cyl 5.7L 76.3 in. Bed, Crew Cab Pickup, Rear Wheel Drive
  • 2012 Ram 2500 SLT 8 Cyl 5.7L 98.3 in. Bed, Standard Cab Pickup, Four Wheel Drive
  • 2012 Ram 2500 ST 8 Cyl 5.7L 98.3 in. Bed, Standard Cab Pickup, Rear Wheel Drive
Product Details
Material : Made of Aluminized SteelSystem Type : Cat-BackQuantity Sold : KitWarranty : 1-year MBRP limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Performance SeriesExit Location : Exit: After Rear Tire (Passenger Side)Main Piping Diameter : 3 in. Main PipeRecommended Use : OE UpgradeProduct Fit : Direct Fit
Cat-Back Exhaust System, 6, 6.7, Made of Stainless Steel, Black Series
Part Number: M6617069
Guaranteed to Fit
$733.00
Vehicle Fitment
  • 2012 Ram 2500 ST 6 Cyl 6.7L Crew Cab Pickup, Rear Wheel Drive, Single Passenger Side Rear Exit
  • 2012 Ram 2500 Laramie Longhorn 6 Cyl 6.7L Crew Cab Pickup, Rear Wheel Drive, Single Passenger Side Rear Exit
  • 2012 Ram 2500 SLT 6 Cyl 6.7L Extended Crew Cab Pickup, Rear Wheel Drive, Single Passenger Side Rear Exit
  • 2012 Ram 2500 Laramie 6 Cyl 6.7L Extended Crew Cab Pickup, Rear Wheel Drive, Single Passenger Side Rear Exit
  • 2012 Ram 2500 Outdoorsman 6 Cyl 6.7L Crew Cab Pickup, Rear Wheel Drive, Single Passenger Side Rear Exit
Product Details
Material : Made of Stainless SteelSystem Type : Cat-BackQuantity Sold : KitWarranty : Lifetime Magnaflow Limited WarrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Specialty Part : Performance Part by JCWSeries : Black SeriesRecommended Use : OE UpgradeProduct Fit : Direct Fit
Cat-Back, Exhaust System, 8 Cyl 5.7L, Standard Cab Pickup, RWD, Made of Stainless Steel, FlowFX Series -
Part Number: F13717867
Guaranteed to Fit
$599.95
Vehicle Fitment
  • 2012 Ram 2500 Laramie 8 Cyl 5.7L Crew Cab Pickup, RWD
  • 2012 Ram 2500 Power Wagon 8 Cyl 5.7L Crew Cab Pickup, 4WD
  • 2012 Ram 2500 Laramie Longhorn 8 Cyl 5.7L Extended Crew Cab Pickup, 4WD
  • 2012 Ram 2500 SLT 8 Cyl 5.7L Extended Crew Cab Pickup, 4WD
  • 2012 Ram 2500 ST 8 Cyl 5.7L Standard Cab Pickup, RWD
  • 2012 Ram 2500 Outdoorsman 8 Cyl 5.7L Extended Crew Cab Pickup, 4WD
Product Details
Notes : 3 in. ID Inlet; 18 in. Muffler Body Length; 4.5 in. Tail Pipe Diameter; 4.5 in. Tip DiameterMaterial : Made of Stainless SteelSystem Type : Cat-BackQuantity Sold : KitWarranty : Lifetime Flowmaster Limited WarrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : FlowFX SeriesExit Location : Exit: After Rear Tire (Passenger Side)Main Piping Diameter : 3 in. Main PipeRecommended Use : OE UpgradeProduct Fit : Direct Fit
DPF-Back, Exhaust System, 6 Cyl 6.7L, 98.3 in. Bed, Extended Crew Cab Pickup, Four Wheel Drive, Made of Stainless Steel, XP Series -
Part Number: M79S6130409
Guaranteed to Fit
$429.99
Vehicle Fitment
  • 2012 Ram 2500 ST 6 Cyl 6.7L 98.3 in. Bed, Standard Cab Pickup, Four Wheel Drive
  • 2012 Ram 2500 Outdoorsman 6 Cyl 6.7L 76.3 in. Bed, Crew Cab Pickup, Four Wheel Drive
  • 2012 Ram 2500 SLT 6 Cyl 6.7L 98.3 in. Bed, Extended Crew Cab Pickup, Rear Wheel Drive
  • 2012 Ram 2500 Laramie 6 Cyl 6.7L 76.3 in. Bed, Extended Crew Cab Pickup, Rear Wheel Drive
  • 2012 Ram 2500 Laramie Longhorn 6 Cyl 6.7L 76.3 in. Bed, Extended Crew Cab Pickup, Four Wheel Drive
Product Details
Material : Made of Stainless SteelSystem Type : DPF-BackQuantity Sold : KitWarranty : Lifetime MBRP limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : XP SeriesExit Location : Exit: After Rear Tire (Passenger Side)Main Piping Diameter : 4 in. Main PipeRecommended Use : OE UpgradeProduct Fit : Direct Fit
Cat-Back, Exhaust System, 6 Cyl 6.7L, Extended Crew Cab Pickup, Four Wheel Drive, Single Passenger Side Rear Exit, Made of Stainless Steel, Pro Series -
Part Number: M6617874
Guaranteed to Fit
$612.00
Vehicle Fitment
  • 2012 Ram 2500 ST 6 Cyl 6.7L Crew Cab Pickup, Rear Wheel Drive, Single Passenger Side Rear Exit
  • 2012 Ram 2500 Laramie Longhorn 6 Cyl 6.7L Crew Cab Pickup, Rear Wheel Drive, Single Passenger Side Rear Exit
  • 2012 Ram 2500 SLT 6 Cyl 6.7L Extended Crew Cab Pickup, Rear Wheel Drive, Single Passenger Side Rear Exit
  • 2012 Ram 2500 Laramie 6 Cyl 6.7L Extended Crew Cab Pickup, Rear Wheel Drive, Single Passenger Side Rear Exit
  • 2012 Ram 2500 Outdoorsman 6 Cyl 6.7L Crew Cab Pickup, Rear Wheel Drive, Single Passenger Side Rear Exit
Product Details
Material : Made of Stainless SteelSystem Type : Cat-BackQuantity Sold : KitWarranty : Lifetime Magnaflow Limited WarrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Specialty Part : Performance Part by JCWSeries : Pro SeriesRecommended Use : OE UpgradeProduct Fit : Direct Fit
Cat-Back, Exhaust System, 8 Cyl 5.7L, Crew Cab Pickup, RWD, Made of Stainless Steel, American Thunder Series -
Part Number: F13817507
Guaranteed to Fit
$920.95
Vehicle Fitment
  • 2012 Ram 2500 Laramie 8 Cyl 5.7L Crew Cab Pickup, RWD
  • 2012 Ram 2500 Power Wagon 8 Cyl 5.7L Crew Cab Pickup, 4WD
  • 2012 Ram 2500 Laramie Longhorn 8 Cyl 5.7L Extended Crew Cab Pickup, 4WD
  • 2012 Ram 2500 SLT 8 Cyl 5.7L Extended Crew Cab Pickup, 4WD
  • 2012 Ram 2500 ST 8 Cyl 5.7L Standard Cab Pickup, RWD
Product Details
Notes : Includes 50 Series HD MufflerMaterial : Made of Stainless SteelSystem Type : Cat-BackQuantity Sold : KitWarranty : Lifetime Flowmaster Limited WarrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Main Piping Diameter : 2.5 in. Main PipeRecommended Use : OE UpgradeProduct Fit : Direct FitSeries : American Thunder SeriesExit Location : Exit: After Rear Tire (Split Rear or Split Side)Why Buy : Aggressive Tone Chambered Muffler
DPF-Back, Exhaust System, 6 Cyl 6.7L, 98.3 in. Bed, Extended Crew Cab Pickup, Four Wheel Drive, Made of Stainless Steel, XP Series -
Part Number: M79S6134409
Guaranteed to Fit
$554.99
Vehicle Fitment
  • 2012 Ram 2500 ST 6 Cyl 6.7L 98.3 in. Bed, Standard Cab Pickup, Four Wheel Drive
  • 2012 Ram 2500 Outdoorsman 6 Cyl 6.7L 76.3 in. Bed, Crew Cab Pickup, Four Wheel Drive
  • 2012 Ram 2500 SLT 6 Cyl 6.7L 98.3 in. Bed, Extended Crew Cab Pickup, Rear Wheel Drive
  • 2012 Ram 2500 Laramie 6 Cyl 6.7L 76.3 in. Bed, Extended Crew Cab Pickup, Rear Wheel Drive
  • 2012 Ram 2500 Laramie Longhorn 6 Cyl 6.7L 76.3 in. Bed, Extended Crew Cab Pickup, Rear Wheel Drive
Product Details
Material : Made of Stainless SteelSystem Type : DPF-BackQuantity Sold : KitWarranty : Lifetime MBRP limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : XP SeriesExit Location : Exit: After Rear Tire (Passenger Side)Main Piping Diameter : 5 in. Main PipeRecommended Use : OE UpgradeProduct Fit : Direct Fit
DPF-Back, Exhaust System, 6.7L, 76.3 in. Bed, Crew Cab Pickup, Rear Wheel Drive, Made of Aluminized Steel, Installer Series -
Part Number: M79S6130AL
Guaranteed to Fit
$389.99
Vehicle Fitment
  • 2012 Ram 2500 ST 6 Cyl 6.7L 98.3 in. Bed, Standard Cab Pickup, Four Wheel Drive
  • 2012 Ram 2500 Outdoorsman 6 Cyl 6.7L 76.3 in. Bed, Crew Cab Pickup, Four Wheel Drive
  • 2012 Ram 2500 SLT 6 Cyl 6.7L 98.3 in. Bed, Extended Crew Cab Pickup, Rear Wheel Drive
  • 2012 Ram 2500 Laramie 6 Cyl 6.7L 76.3 in. Bed, Extended Crew Cab Pickup, Rear Wheel Drive
  • 2012 Ram 2500 Laramie Longhorn 6 Cyl 6.7L 76.3 in. Bed, Extended Crew Cab Pickup, Four Wheel Drive
Product Details
Material : Made of Aluminized SteelSystem Type : DPF-BackQuantity Sold : KitWarranty : MBRP 3-year Limited WarrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Installer SeriesExit Location : Exit: After Rear Tire (Passenger Side)Main Piping Diameter : 4 in. Main PipeRecommended Use : OE UpgradeProduct Fit : Direct Fit
DPF-Back Exhaust System, 6, 6.7, Made of Aluminized Steel, Performance Series
Part Number: M79S61340PLM
Guaranteed to Fit
$384.99
Vehicle Fitment
  • 2012 Ram 2500 ST 6 Cyl 6.7L 98.3 in. Bed, Standard Cab Pickup, Four Wheel Drive
  • 2012 Ram 2500 Outdoorsman 6 Cyl 6.7L 76.3 in. Bed, Crew Cab Pickup, Four Wheel Drive
  • 2012 Ram 2500 SLT 6 Cyl 6.7L 98.3 in. Bed, Extended Crew Cab Pickup, Rear Wheel Drive
  • 2012 Ram 2500 Laramie 6 Cyl 6.7L 76.3 in. Bed, Extended Crew Cab Pickup, Rear Wheel Drive
  • 2012 Ram 2500 Laramie Longhorn 6 Cyl 6.7L 76.3 in. Bed, Extended Crew Cab Pickup, Rear Wheel Drive
Product Details
Material : Made of Aluminized SteelSystem Type : DPF-BackQuantity Sold : KitWarranty : 1-year MBRP limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Performance SeriesExit Location : Exit: After Rear Tire (Passenger Side)Main Piping Diameter : 5 in. Main PipeRecommended Use : OE UpgradeProduct Fit : Direct Fit
DPF-Back, Exhaust System, 6 Cyl 6.7L, 98.3 in. Bed, Extended Crew Cab Pickup, Rear Wheel Drive, Made of Aluminized Steel, Installer Series -
Part Number: M79S6134AL
Guaranteed to Fit
$409.99
Vehicle Fitment
  • 2012 Ram 2500 ST 6 Cyl 6.7L 98.3 in. Bed, Standard Cab Pickup, Four Wheel Drive
  • 2012 Ram 2500 Outdoorsman 6 Cyl 6.7L 76.3 in. Bed, Crew Cab Pickup, Four Wheel Drive
  • 2012 Ram 2500 SLT 6 Cyl 6.7L 98.3 in. Bed, Extended Crew Cab Pickup, Rear Wheel Drive
  • 2012 Ram 2500 Laramie 6 Cyl 6.7L 76.3 in. Bed, Extended Crew Cab Pickup, Rear Wheel Drive
  • 2012 Ram 2500 Laramie Longhorn 6 Cyl 6.7L 76.3 in. Bed, Extended Crew Cab Pickup, Rear Wheel Drive
Product Details
Material : Made of Aluminized SteelSystem Type : DPF-BackQuantity Sold : KitWarranty : MBRP 3-year Limited WarrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Installer SeriesExit Location : Exit: After Rear Tire (Passenger Side)Main Piping Diameter : 5 in. Main PipeRecommended Use : OE UpgradeProduct Fit : Direct Fit
DPF-Back Exhaust System, 6, 6.7, Made of Aluminized Steel, Black Series
Part Number: M79S6130BLK
Guaranteed to Fit
$484.99
Vehicle Fitment
  • 2012 Ram 2500 ST 6 Cyl 6.7L 98.3 in. Bed, Standard Cab Pickup, Four Wheel Drive
  • 2012 Ram 2500 Outdoorsman 6 Cyl 6.7L 76.3 in. Bed, Crew Cab Pickup, Four Wheel Drive
  • 2012 Ram 2500 SLT 6 Cyl 6.7L 98.3 in. Bed, Extended Crew Cab Pickup, Rear Wheel Drive
  • 2012 Ram 2500 Laramie 6 Cyl 6.7L 76.3 in. Bed, Extended Crew Cab Pickup, Rear Wheel Drive
  • 2012 Ram 2500 Laramie Longhorn 6 Cyl 6.7L 76.3 in. Bed, Extended Crew Cab Pickup, Four Wheel Drive
Product Details
Material : Made of Aluminized SteelSystem Type : DPF-BackQuantity Sold : KitWarranty : 1-year MBRP warranty limited on coating with 3-year warranty on exhaust componentsProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Black SeriesExit Location : Exit: After Rear Tire (Passenger Side)Main Piping Diameter : 4 in. Main PipeRecommended Use : OE UpgradeProduct Fit : Direct Fit
Cat-Back, Exhaust System, 8 Cyl 5.7L, 76.3 in. Bed, Crew Cab Pickup, Rear Wheel Drive, Made of Stainless Steel, XP Series -
Part Number: M79S5148409
Guaranteed to Fit
$629.99
Vehicle Fitment
  • 2012 Ram 2500 Laramie 8 Cyl 5.7L 98.3 in. Bed, Crew Cab Pickup, Rear Wheel Drive
  • 2012 Ram 2500 Power Wagon 8 Cyl 5.7L 76.3 in. Bed, Crew Cab Pickup, Four Wheel Drive
  • 2012 Ram 2500 Laramie Longhorn 8 Cyl 5.7L 76.3 in. Bed, Crew Cab Pickup, Rear Wheel Drive
  • 2012 Ram 2500 SLT 8 Cyl 5.7L 98.3 in. Bed, Standard Cab Pickup, Four Wheel Drive
  • 2012 Ram 2500 ST 8 Cyl 5.7L 98.3 in. Bed, Standard Cab Pickup, Rear Wheel Drive
Product Details
Material : Made of Stainless SteelSystem Type : Cat-BackQuantity Sold : KitWarranty : Lifetime MBRP limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : XP SeriesExit Location : Exit: After Rear Tire (Passenger Side)Main Piping Diameter : 3 in. Main PipeRecommended Use : OE UpgradeProduct Fit : Direct Fit
DPF-Back, Exhaust System, 6 Cyl 6.7L, 98.3 in. Bed, Crew Cab Pickup, Made of Aluminized Steel, Power ATLAS Series -
Part Number: A184902016B
Guaranteed to Fit
$645.00
Vehicle Fitment
  • 2012 Ram 2500 ST 6 Cyl 6.7L 76.3 in. Bed, Crew Cab Pickup
  • 2012 Ram 2500 Outdoorsman 6 Cyl 6.7L 98.3 in. Bed, Mega Cab
  • 2012 Ram 2500 SLT 6 Cyl 6.7L 98.3 in. Bed, Crew Cab Pickup
  • 2012 Ram 2500 Laramie 6 Cyl 6.7L 76.3 in. Bed, Mega Cab
  • 2012 Ram 2500 Laramie Longhorn 6 Cyl 6.7L 76.3 in. Bed, Mega Cab
Product Details
Material : Made of Aluminized SteelSystem Type : DPF-BackQuantity Sold : KitWarranty : 2-year AFE limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Power ATLAS SeriesExit Location : Exit: After Rear Tire (Passenger Side)Main Piping Diameter : 5 in. Main PipeRecommended Use : Performance ReplacementProduct Fit : Direct Fit
Cat-Back Exhaust System, 6, 6.7, Made of Stainless Steel, Black Series
Part Number: M6617070
Guaranteed to Fit
$832.00
Vehicle Fitment
  • 2012 Ram 2500 ST 6 Cyl 6.7L Crew Cab Pickup, Four Wheel Drive, Dual Same Side Behind Passenger Rear Tire Exit
  • 2012 Ram 2500 Laramie Longhorn 6 Cyl 6.7L Extended Crew Cab Pickup, Rear Wheel Drive, Dual Same Side Behind Passenger Rear Tire Exit
  • 2012 Ram 2500 SLT 6 Cyl 6.7L Extended Crew Cab Pickup, Four Wheel Drive, Dual Same Side Behind Passenger Rear Tire Exit
  • 2012 Ram 2500 Laramie 6 Cyl 6.7L Extended Crew Cab Pickup, Four Wheel Drive, Dual Same Side Behind Passenger Rear Tire Exit
  • 2012 Ram 2500 Outdoorsman 6 Cyl 6.7L Extended Crew Cab Pickup, Rear Wheel Drive, Dual Same Side Behind Passenger Rear Tire Exit
Product Details
Material : Made of Stainless SteelSystem Type : Cat-BackQuantity Sold : KitWarranty : Lifetime Magnaflow Limited WarrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Specialty Part : Performance Part by JCWSeries : Black SeriesRecommended Use : OE UpgradeProduct Fit : Direct Fit
Page 1 of 1 | Showing 1 - 15 of 15 results

Top Rated Products

Just what I wanted, east to install, nice sound, worh the money!! Couldnt be happier!See More
Anonymous
VERIFIED PURCHASER

Popular Products

Helpful Automotive Resources

Engine Knocking Sound: What Does it Mean?
Engine Knocking Sound: What Does it Mean?You may notice that the noise becomes more frequent when engine speed is increased, especially if the sound is due to a failed bearing. What Does a Knocking Noise in the Engine Mean?