



01-07 GM 6.6L Duramax 4" Diamond Eye Aluminized 4 Bolt Adapter Plate
$69.05
- Part Number: 321045
- Est. Ship Time: Contact To Confirm Availability

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Starting From $405.23
321045 - FOR 2001, 2002, 2003, 2004, 2005, 2006 & EARLY 2007 - CHEVY/GMC 6.6L DURAMAX DIESEL 2500/3500 - 4" ALUMINIZED - PERFORMANCE DIESEL EXHAUST - 4 BOLT ADAPTER PLATE
This adapter plate has a 4-bolt welded flange on one side and a 4 inch diameter slip-fit connection on the opposite side. It is designed to connect your exhaust to the turbocharger downpipe.

Tags:
01-07 GM 6.6L Duramax 4 Diamond Eye Aluminized 4 Bolt Adapter Plate
, 321045
, Exhaust Systems
Aluminized Steel 4 Inch Front Pipe with Flange for 2001-2004 Chevy/GM 6.6L Duramax Diesel
THIS PRODUCT CANNOT SHIP TO CALIFORNIA
MBRP: GMAL401..
$189.99
Features:
*Increased Fuel Economy
*Lower EGTs
*Mandrel Bent Tubing for Maximum Flow
*Direct Fit
*Increased Horsepower and Torque
*Agressive So..
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Features:
*Increased Fuel Economy
*Lower EGTs
*Mandrel Bent Tubing for Maximum Flow
*Direct Fit
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*Agressive So..
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*Increased Fuel Economy
*Lower EGTs
*Mandrel Bent Tubing for Maximum Flow
*Direct Fit
*Increased Horsepower and Torque
*Agressive So..
$540.03
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*Increased Fuel Economy
*Lower EGTs
*Mandrel Bent Tubing for Maximum Flow
*Direct Fit
*Increased Horsepower and Torque
*Agressive So..
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This is the pipe that is between the downpipe and muffler.
4" Aluminized
Diamond Eye part number: 321046..
$121.49
4001 - FOR 2001, 2002, 2003, 2004, 2005, 2006 & EARLY 2007 - CHEVY/GMC 6.6L DURAMAX DIESEL 2500/3500 - PERFORMANCE DIESEL EXHAUST - HIG..
$11.56
This is the pipe that is between the downpipe and muffler.
4" Aluminized
Diamond Eye part number: 321046..
$121.49
Airflow Rating
Cotton, Cleanable: Flows 47.8% better than the Stock Intake
Dry: Flows 46.7% Better than the Stock Intake
Efficiency Rating ..
Starting From $349.00
Applications:
01-07 GM Silverado & Sierra 2500HD & 3500HD 6.6L Duramax
06-07 GM Express & Savana 6.6L Duramax
04-07 GM C4500 &..
$35.14
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**
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*Increased Fuel Economy
*Lower EGTs
*Mandrel Bent Tubing for Maximum Flow
*Di..
$464.52
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*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
*Increased Horsepower and Torque
*Agressive So..
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Cruise the highway or hit the track with an MBRP Street Profile exhaust. It’s the perfect mix of aggressive sound when you’re into the thr..
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Cruise the highway or hit the track with an MBRP Street Profile exhaust. It’s the perfect mix of aggressive sound when you’re into the thr..
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Physical fitment.
Why consider a cheap, ill-fitting aluminized exhaust? Banks 4” Monster Exhaust is made of rugged, long-lasting 100% stainless steel..
$540.00
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
Fits, GM Duramax Diesel 2001-2005 6.6L 2500/3500. For, Extended Cab, Long/Short box, Dually. Exclude Suburban.
With 4 Bolt Converter Flange and Gaske..
$484.47
Fits, GM Duramax Diesel 2001-2005 6.6L 2500/3500. For, Extended Cab, Long/Short box, Dually. Exclude Suburban.
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4” Cat Back, Single Side Exit - Aluminized Steel
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