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Doug's Headers D336 3/8" Thick Machined Flanges... No Warping; Cnc Mandrel Bent Tubes... Accurate Fit & Better Flow; Precision Formed Long Transition Collectors And Long Tube Design... Reduces Backpressure And Increases Higher Rpm Horsepower; Heavy 16 Gauge Tubing... Longer

Manufacturer

Doug's Headers

Picture for manufacturer Doug's Headers H8025-1 H8025-1 1-5/8" Tri-5 Exhaust Header for Big Block Chevrolet 55-57

Part Number

D336
14 reviews
04/19/2034 5:04 AM
Sale Price

$857.50

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Product Details

Doug's Headers D336 3/8" Thick Machined Flanges... No Warping; Cnc Mandrel Bent Tubes... Accurate Fit & Better Flow; Precision Formed Long Transition Collectors And Long Tube Design... Reduces Backpressure And Increases Higher Rpm Horsepower; Heavy 16 Gauge Tubing... Longer

Doug's Headers (D336) 1-3/4" 4-Tube Metallic Ceramic Coating Full Length Exhaust Header for Chevrolet 265-400 Engine

Doug's Passenger Car Headers Long Tube Metallic Ceramic Coated. Header development and design is complex and requires a substantial amount of time and resources to do the job right! Many manufacturers are unwilling to make the commitment and instead offer compromised headers at lower prices. Doug's will not compromise performance, quality or fit to compete with inferior designs at cheap price. Every Doug's header is tuned with the proper tube size and length to efficiently remove all the exhaust from each cylinder, reducing pumping losses resulting in a dramatic increases in horsepower and torque. Doug's headers are carefully developed on the vehicles they are intended to fit and are re-checked numerous times during the design and manufacturing process.

Products specifications

Prop 65 - Short Label

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EmissionFullDES

3 - This Product is ILLEGAL for Street or Off Highway use and is only intended f

Finish

Metallic Ceramic Coated

Quick and easy!

Quick process, best price

Thanks

I hope the part fits my car

Great

Easy transaction

So far the best price that I have found

Item arrived quickly and as described. Thanks

Just purchased a B&W 5th wheel companion hitch to tow my new camper. Got an awesome price on it and shipping was quick. I would make a purchase again from them and would recommend Autoplicity to a friend. AAAAA++++++++++++ <br><br>Thanks<br><br>Dennis

price was good and the sight was easy to use if the product is as good as everything else I'll be back.

Quick

Great!

The ordering process was simple and user friendly. The pricing was the lowest I could find for a brand new AMP Powerstep for my Ford F150. The tracking number was provided and the item is scheduled for FedEx ground delivery in 3-days.

Easy deal

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