
Diamond Eye Diamond Eye 4" Off Road Aluminized High Flow Muffler Delete Pipe
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$49.09
- Part Number: 51020x
- Est. Ship Time: Contact to Confirm Availability

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Starting From $405.23
4" ALUMINIZED - PERFORMANCE DIESEL EXHAUST - MUFFLER REPLACEMENT PIPE - HIGH FLOW - STRAIGHT THROUGH - 4" I.D. X 4" I.D.
Comes in either 27" or 30" lengths.
SEE BELOW FOR OPTIONS

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Diamond Eye 4 Off Road Aluminized High Flow Muffler Delete Pipe
, 51020x
, Muffler & Cat Test Pipes
3.5" T409 STAINLESS STEEL HIGH FLOW - PERFORMANCE MUFFLER - 3.5" I.D. X 3.5" I.D.Choice of single inlet and outlet, single inlet with dual outlet (ext..
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4" ALUMINIZED LOUVERED HIGH FLOW- STRAIGHT THROUGH PERFORMANCE MUFFLER - 4" I.D. X 4" I.D.
Comes in either 26" or 30" leng..
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4" STAINLESS PERFORATED HIGH FLOW- STRAIGHT THROUGH PERFORMANCE MUFFLER - 4" I.D. X 4" I.D.
Comes in either 26" or 30" len..
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4" ALUMINIZED LOUVERED HIGH FLOW- STRAIGHT THROUGH PERFORMANCE MUFFLER - 5" I.D. X 5" I.D.
Comes in either 26" or 30" lengths.
SEE BELOW FOR OPTIONS..
$230.73
4" ALUMINIZED - PERFORMANCE DIESEL EXHAUST - MUFFLER REPLACEMENT PIPE - HIGH FLOW - STRAIGHT THROUGH - 4" I.D. X 4" I.D.
..
$49.09
4" STAINLESS STEEL- PERFORMANCE DIESEL EXHAUST - MUFFLER REPLACEMENT PIPE - HIGH FLOW - STRAIGHT THROUGH - 4" I.D. X 4" I.D.
C..
$85.02
Discontinued (11/30/23)Muffler, 4"; Single In / Single Out:
409 Stainless Steel Perforated Packed
20" Overall, 14" Body; 7" Case
Diamond Eye part..
$0.00
Muffler, 5"; Single In / Single Out:
409 Stainless Steel Perforated Packed
20" Overall, 14" Body; 7" Case
Diamond Eye par..
$163.99
Muffler, 4"; Single In / Single Out:
409 Stainless Steel Perforated Packed Louvered
30" Overall, 24" Body; 7" Case
Diamon..
$182.04
Backordered With No ETA (Updated 4/30/2025)
Muffler, 5"; Single In / Single Out:
Aluminized Baffled Core
51" Overall, 45" Body..
$229.79
If you have a modified 89-93 Dodge 5.9L Cummins truck, you already know that it is a pain to adjust the stock fuel screw.
This custom made extra-long..
$21.99
Set of 12 5.9L 12 Valve Dodge Cummins Valve Seals
These are NOT the updated later-year 12 Valve Top-Hat Style Seals.
Cummins: 3921640..
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Fleetguard LF3894 Stratapore oil filter for the 89-02 Dodge 5.9L Cummins Diesel.
Most filters look the same on the outside. It's what's inside tha..
$20.44
NOW YOU CAN COMPRESS BOTH VALVE SPRINGS ON YOUR CUMMINS 12 VALVE, AT THE SAME TIME!
The first ever valve spring compressor designed for the Cummins..
$45.25
12-60lb Intake & Exhaust Valve Springs 89-98 12 Valve Dodge 5.9L Cummins
The seat pressure on these springs is ~150bs at the installed height o..
$275.76
Sinister Coolant Filter System
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MBRP Diesel Bolt on Exhaust Tip
4" Inlet, 5" Outlet, 12" LengthSingle Wall, Angle CutClamp on design requires no welding for installation.T-304 Polis..
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5 Inch Stainless Bolt-On Exhaust Tip
304 Stainless Steel
4 Inch Inlet, 5 Inch Outlet, 12" Long
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Cummins Adjustable Overflow Valve for the Bosch P7100 Injection Pump
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MBRP Bolt-On Diesel Exhaust Tip
4" Inlet, 8" Outlet. 15 Degree Slant Cut with Rolled End. 18" Long.
T304 Polished Stainless
MBRP: T5128..
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Weld-On Tip
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This is an AFTERMARKET piece, it may not be a direct replacement in a stock exhaust system.
There are 2 sections to the tailpipe. The Second ..
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This is an AFTERMARKET piece, it may not be a direct replacement in a stock exhaust system. One end is ID, the exhaust exit side is OD.
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Tantrum kits are the ultimate strobe system on the market, featuring one of a kind LED pods that have lead the Tantrum kits to become popular for wa..
$119.00
Features:
*Increased Fuel Economy
*Lower EGTs
*Mandrel Bent Tubing for Maximum Flow
*Direct Fit
*Increased Horsepower and Torque
*Agressive So..
$405.23
**This Kit Does Not Include Muffler**
Features:
*Increased Fuel Economy
*Lower EGTs
*Mandrel Bent Tubing for Maximum Flow
*Di..
$347.57
Backordered with No ETA (Updated on 4/30/2025)
Features:
*Increased Fuel Economy
*Lower EGTs
*Mandrel Bent Tubing for Maximum Flow
*Di..
$478.75
**This Kit Does Not Include Muffler**
Features:
*Increased Fuel Economy
*Lower EGTs
*Mandrel Bent Tubing for Maximum Flow
*Di..
$419.19
Allow a 1 week lead time!
Features:
*Increased Fuel Economy
*Lower EGTs
*Mandrel Bent Tubing for Maximum Flow
*Direct Fit
*Increas..
$478.75
**This Kit Does Not Include Muffler**
Features:
*Increased Fuel Economy
*Lower EGTs
*Mandrel Bent Tubing for Maximum Flow
*Direct Fit
..
$419.19
Features:
*Increased Fuel Economy
*Lower EGTs
*Mandrel Bent Tubing for Maximum Flow
*Direct Fit
*Increased Horsepower and Torque
*Agressive So..
$405.23
**This Kit Does Not Include Muffler**
Features:
*Increased Fuel Economy
*Lower EGTs
*Mandrel Bent Tubing for Maximum Flow
*Di..
$347.57
Features:
*Increased Fuel Economy
*Lower EGTs
*Mandrel Bent Tubing for Maximum Flow
*Direct Fit
*Increased Horsepower and Torque
*Agressive So..
$478.75
Features:
*Increased Fuel Economy
*Lower EGTs
*Mandrel Bent Tubing for Maximum Flow
*Direct Fit
*Increased Horsepower and Torque
*Agressive So..
$478.75
**This Kit Does Not Include Muffler**
Features:
*Increased Fuel Economy
*Lower EGTs
*Mandrel Bent Tubing for Maximum Flow
*Di..
$419.19
Features:
*Increased Fuel Economy
*Lower EGTs
*Mandrel Bent Tubing for Maximum Flow
*Direct Fit
*Increased Horsepower and Torque
*Agressive So..
$558.76
**This Kit Does Not Include Muffler**
Features:
*Increased Fuel Economy
*Lower EGTs
*Mandrel Bent Tubing for Maximum Flow
*Di..
$464.52
Features:
*Increased Fuel Economy
*Lower EGTs
*Mandrel Bent Tubing for Maximum Flow
*Direct Fit
*Increased Horsepower and Torque
*Agressive So..
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*Increased Fuel Economy
*Lower EGTs
*Mandrel Bent Tubing for Maximum Flow
*Direct Fit
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*Agressive So..
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The AP Exhaust 24838 5" Stainless Steel Pre-Cut Flex Hose features a stainless ste..
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aFe Power is proud to introduce the all new diesel exhaust tip. This tip comes with a black finish and is designed to fit 3-1/2" exhaust systems...
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aFe Power is proud to introduce the all new diesel exhaust tip. This tip comes with a black finish and is designed to fit 4" exhaust systems. Wit..
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aFe POWER is proud to introduce an all new intercooled exhaust tip. This tip comes with a black finish and is designed to fit 4" exhaust systems...
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Nothing looks cooler than a huge tip completing your exhaust system. The aFe Power tip is constructed out of high luster, polished 304 stainless steel..
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The polished aFe 304 stainless steel exhaust tip is designed to fit 4" exhaust systems. A 304 stainless steel band clamp ensures a very secure gr..
$93.00
The polished aFe 304 stainless steel exhaust tip is designed to fit 4" exhaust systems. A 304 stainless steel band clamp ensures a very secure gr..
$93.00
aFe POWER is proud to introduce an all new intercooled exhaust tip. This tip comes with a high luster polished finish and is designed to fit 4" e..
$137.00
aFe POWER is proud to introduce an all new intercooled exhaust tip. This tip comes with a polished finish and is designed to fit 4" exhaust syste..
$137.00
aFe Power is proud to introduce the all new diesel exhaust tip. This tip comes with a black finish and is designed to fit 4" exhaust systems. Wit..
$137.00