01-16 GM 6.6L Duramax Dorman Left Side Exhaust Manifold
$87.19
- Part Number: 674-731
- Est. Ship Time: Usually Ships In 1-2 Business Days

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Fits: 2001-2016 GM 6.6L Duramax LB7/LLY/LBZ/LMM/LML
This Dorman Left Side Exhaust Manifold is the perfect replacement for your 2001-2016 GM 6.6L Duramax. The exhaust manifold was built with precision to a exact fit and function of the original factory manifold. The cast iron build helps decrease warping, cracking and leaking for long-lasting reliability. It comes with all the gaskets and downpipe hardware for a complete switch out.
Features:
- Ideal replacement - this exhaust manifold was precision-engineered and durably manufactured to match the fit and function of the stock manifold on specified vehicles
- Reliable construction - durable materials resist warping, cracking and leaking for long-lasting performance
- Complete repair - includes all necessary gaskets and downpipe hardware
- Trustworthy design - built by industry leader in aftermarket manifolds
Dorman:674-731

Fits: 2001-2016 GM 6.6L Duramax LB7/LLY/LBZ/LMM/LML
This Dorman Right Side Exhaust Manifold is an exact replacement for your 2001-2016 GM 6.6L Dura..
$232.85
RThe PPE 117000500 3" Stainless Steel Downpipe for your 2004.5-2010 GM 6.6L Duramax allows you to removed your crushed oval stock downpipe and replace..
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Discontinued
Max-Flow Up-Pipes
Fits 2001-2004 Silverado/Sierra Duramax w/Federal Emissions
Part# MAX-ARAL-0104
*For use with OEM length/st..
$0.00
Elevate your truck's performance with the Garrett GT3788VA 6.6L LLY/LBZ/LMM Duramax New Stock Replacement Turbocharger, specifically designed for 2004..
$1,464.61
Remove the Stock Turbo Resonator with this cap to Clean up under your hood...
$13.08
Fits: 2004.5-2005 VIN Code "2" Chevy LLY Duramax Turbo Install Kit
Marchant part number: 10122...
$73.86
If you have original GM Manifolds and PPE Up-Pipes, this bracket (stay) secures your PPE Down-Pipe and prevents movement. An unsecured Down-Pipe that ..
$31.49
The PPE 114028000 Crankcase Breather Tubing Kit includes the hoses and clamps needed to re-route the crankcase breather in your 2004.5-2010 GM 6.6L Du..
$35.99
Billet aluminum valve cover breathers intended for race applications. Re-route breather hose from turbo intake to catch can along side bottom of engin..
$26.99
The PPE 116120000 Replacement Up-Pipes for your 2001-2004 GM 6.6L LB7 Duramax increase flow, and reliability. Even a stock Duramax can produce high te..
$269.99
The perfect addition to any exhaust manifold replacement or upgrade on your Duramax. Our phosphate & oil coated bolts meet or exceed OE specs. Pai..
$55.99
The Position 1 Performance Re-route plug provides a custom look under the hood of your 2004-2010 GM 6.6L Duramax. Featuring a billet aluminum construc..
$20.15 $22.38
Make turbo installations easier and ensure good oil supply to your turbocharger with our remote oil feed line! Problem: The factory tu..
$99.99
2 13/16" - Length
7/8" - Height
5/16" - Hanger Holes
1 1/2" - Spacing between holes
Part number: 16219 (16219-1, 16219-10, BR560-001)..
$6.49
Price is per rod bearing. Sold individually. 8 required for a full set.
Mahle Clevite connecting rod bearing.
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The Dorman 904-412 Left Side Glow Plug Harness is a direct replacement for your worn out, oil-drenched or dry rotted glow plug harness on your 2008-20..
$46.70
Dorman Engine Oil Cooler Line (Inlet, Lower)
Part number: 625-164..
$50.50
This fuel water separator drain valve is designed to match the fit and function of the original valve on specified vehicles, and is engineered for dur..
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Wheel hub bolts stripped, bent or seized? These wheel hub bolts directly replace the original bolts on certain vehicle years, makes and models.
&nb..
$33.80
Replacing a drive shaft doesn't have to be complicated. This complete drive shaft assembly is pre-balanced and ready to install with 100% new yokes, t..
$422.31
Fuel lines on certain Ford and International vehicles leak due to vibration from a weak bracket. This Dorman OE FIX upgrades the bracket to prevent fu..
$47.26
This replacement engine coolant thermostat housing is engineered to match the fit and durability of the stock thermostat housing on specified vehicles..
$34.38
Original equipment brake lines are highly rust prone. This Dorman OE FIX brake hydraulic line kit is made of upgraded stainless steel to resist corros..
$119.14
Fits: 2001-2003 GM Silverado/Sierra 2500HD/3500HD (See Applications)
This Dorman 800-605 Transmission Line Fitting (3/8" X 5/8"..
$8.34
Fits: 2001-2004 GM 6.6L Duramax
Don't take chances with an old, questionable, or malfunctioning camshaft position sensor that can leave you strande..
$74.72
Fits: 2001-2004 GM 6.6L Duramax LB7 2500HD/3500HD | 2003-2004 GM C4500/5500 Kodiak/Topkick 6.6L Duramax LB7
Purchase this Dorman 300-825 Engine Coo..
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Fits: 2001-2004 GM 6.6L Duramax LB7
This Dorman Fuel Return Line Banjo Bolt (Return Pipe) is the perfect replacement component your truck needs. Ea..
$9.60
Fits: 2001-2004 GM 6.6L Duramax LB7
This Dorman Glow Plug Harness Relay is perfect for what your truck needs. This part is an OE-style solution for..
$51.11
Fuel leaking from the filter housing? This direct-replacement fuel filter housing eliminates leaks from a damaged coupling to eliminate rough-start an..
$131.16
This transmission range sensor is designed to match the fit and function of the original sensor on specified vehicles, and is engineered for durabilit..
$130.47
These stainless steel up-pipes for the 2001-2004
6.6L LB7 Duramax engine are a great upgrade over the stock up-pipes. The
mandrel-bent up-pipes flow..
$189.99
Replace the lightweight, leak-prone passenger side OEM up pipe with this heavy-duty 11 gauge 2" Stainless up pipe. HD Stainless Bellow that will ..
$324.95
Backordered with no ETA (Updated 5/2/25)
DHD's high flow manifold bundle increases exhaust air flow over 55% without any port modifications. Additi..
$795.00
These full featured OEM fit up pipes are an excellent value! These are brand new and include all the high flow, high quality features your looking for..
$185.00
Replaces the factory exhaust up-pipes (exhaust manifold to the turbo) which are prone to leakage due to the deterioration. BD up-pipes are designed to..
$293.95
*NOT LEGAL FOR SALE OR USE IN CALIFORNIA. THE MANUFACTURE, SALE, OFFER FOR SALE, OR INSTALLATION OF THIS PRODUCT MAY ALSO BE ILLEGAL NATIONWIDE UNDER ..
$409.00
*NOT LEGAL FOR SALE OR USE IN CALIFORNIA. THE MANUFACTURE, SALE, OFFER FOR SALE, OR INSTALLATION OF THIS PRODUCT MAY ALSO BE ILLEGAL NATIONWIDE UNDER ..
$599.00
Kit includes Gaskets and Hardware!Extended Length Up Pipe SetHigh Flow Manifolds RequiredThis extended length high flow up pipe set allows&n..
$335.29
Kit includes Gaskets and Hardware!
Stainless Duramax Up Pipe Set
Best FIT! Best Value!
NO CORE
These full featured OEM length up pipes..
$309.00
*NOT LEGAL FOR SALE OR USE IN CALIFORNIA. THE MANUFACTURE, SALE, OFFER FOR SALE, OR INSTALLATION OF THIS PRODUCT MAY ALSO BE ILLEGAL NATIONWIDE UNDER ..
$969.00
50 States Emissions Legal (E.O. D-701-34)PPE High-Flow Manifolds are made from cast, high-sil moly. The PPE Up-Pipe bellows are internally-sleeved, ma..
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Replace the lightweight, leak-prone, 1 5/8" OEM up pipes with these heavy-duty 11 gauge 2" Stainless up pipe kit. HD Stainless Bellows that ..
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Backordered until Early June (Updated 5/9/25)
Fits: 2001-2016 Gm 6.6L Duramax LB7/LLY/LBZ/LMM/LML
The AFE Bladerunner Exhaust Manifolds feature ..
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Max-Flow Down Pipe Support BracketFits 2001-2016 Chevrolet/GMC Silverado/Sierra 6.6L Duramax*See Fitment Notes Below*Part# MAX-DPB-STOCKIt is very com..
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Fits: 2001-2016 GM 6.6L Duramax LB7/LLY/LBZ/LMM/LML
This Dorman Right Side Exhaust Manifold is an exact replacement for your 2001-2016 GM 6.6L Dura..
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