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Doug's Headers D381-B Side Mount Exhaust Headers Big Block Chevy 4-Inch Collector

(1965-1974 Chevrolet Corvette)

Part of: Doug's Headers Side Mount Exhaust Big Block Chevy Collector

Other options in this family: Doug's Headers D381 Doug's Headers D381-C

Manufacturer

Picture for manufacturer Doug's Headers

Part Number

D381-B
14 reviews
Sale Price

$1,020.57

1 left at this price

delivery box

Usually delivered within 2 days

free shipping

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No Hassle Returns

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Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

Doug's Headers D381-B side mount exhaust headers are engineered specifically for big block Chevrolet applications, delivering improved exhaust flow and performance gains. These headers feature a traditional round port design that matches standard big block Chevy cylinder head port configurations for optimal fitment and exhaust scavenging.

Key Features:

  • Side mount configuration for chassis clearance and simplified installation
  • 4-inch collector diameter for high-flow exhaust systems
  • Durable steel construction with black finish for corrosion resistance
  • Round port design matches OEM and aftermarket big block Chevy heads
  • Sold as a pair for complete left and right side installation

These headers are ideal for performance street builds, weekend warriors, and applications where side exit exhaust routing is required. The generous 4-inch collectors accommodate high-flow catalytic converters or exhaust systems for maximum power potential.

Products specifications

Fits

1965-1974 Chevrolet Corvette

Bolts/Studs Included

Yes

Collector Attachment

Slip fit

Cylinder Head Port Shape

Round

Flange Style

Standard

Flange Thickness (in)

3/8 in.

Header Finish

Painted

Header Material

Steel

Header Style

Side mount

Motor Mounts Included

No

Notes

Off-road use only.

Primary Tube Diameter (in)

2 1/8 in.

Primary Tube Gauge

16-gauge

Quantity

Sold as a pair.

Reducers Included

No

Transmission Mount Included

No

Tuned

No

Weld-Up

No

Y-Pipe Included

No

Finish

Hi-Temp Black Coating

EmissionFullDES

2 - This product is Legal for use on 1974 and older Non-Catalyst equipped vehicl

Prop 65

Yes

So far so good

services good, the parts I found through Amazon on your site were the wrong size. when I tried to re order through your site could not find them and had to call you customer service which was great

it was good!

got what I ordered on time

looked for part, found it, ordered it. Quick and easy. Hope it fits.

so far so good, easy and quick to order!

No problems, quick delivery

first time ive order from here and my experience was great! shipping was crazy fast. and they had the best price shipped on the 2jz arp head stud set i could find. also how on their site they actually list if they have the part in stock and how many which is very helpful. ive payed for parts to find out the vender didn't even have them available. which lead to more down time. and we all hate down time :)

I ordered an Optima battery for my truck after I did a Google search for the battery. Autoplicity was the cheapest on the Web. Even cheaper then eBay. They got me hooked. Thanks Autoplicity

Good

This is the first time I've ordered from Autoplicity. I found they had the best price on the item I was looking for and decided to try them. I ordered this item yesterday(Sunday) and was just informed that it shipped. That is quick. I am pleased with their customer service and will use them as my first source.

Lowest price on the Internet. Fast shipping.

I ordered a Flowmaster cat back system for my 2012 F-150. The order arrived the day they said it would and the product came at a fair price. Well done.

Excellent customer service. Treated me very well. Issued a refund, no problem. Thank you!!

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