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Doug's Headers D380-B Long Tube Headers Small Block Chevy 4" Collector

(1963-1982 Chevrolet Corvette)

Manufacturer

Picture for manufacturer Doug's Headers

Part Number

D380-B
16 reviews
Sale Price

$908.53

In Stock (6)

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Usually delivered within 2 days

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Live-in-stock inventory

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Fitment guaranteed

Fitment guaranteed

Product Details

Doug's Headers D380-B long tube headers are engineered for serious performance enthusiasts seeking maximum horsepower gains on small block Chevy applications. These side mount headers feature precision CNC mandrel-bent tubing that maintains consistent diameter throughout each bend, ensuring optimal exhaust flow and minimizing turbulence compared to crush-bent alternatives.

Key Features:

  • 3/8" thick laser-cut flanges with machined sealing beads for leak-free performance
  • CNC mandrel-bent primary tubes deliver accurate fitment and superior exhaust velocity
  • Long tube design with extended transition collectors reduces backpressure and maximizes high-RPM horsepower
  • 4-inch diameter collectors for optimal exhaust scavenging
  • Rectangular port configuration matches factory small block Chevy cylinder heads
  • Durable steel construction with painted finish for corrosion resistance
  • Side mount design for traditional installation

The combination of long primary tubes and precision-formed collectors creates improved exhaust scavenging effect, pulling spent gases out of the combustion chamber more efficiently. This design translates to measurable power gains throughout the RPM range, with peak benefits realized at higher engine speeds where backpressure reduction becomes critical. Sold as a pair for complete left and right side installation.

Products specifications

Fits

1963-1982 Chevrolet Corvette

Bolts/Studs Included

Yes

Collector Attachment

Slip fit

Cylinder Head Port Shape

Rectangular

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)

1 7/8 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

Prop 65

Yes

EmissionFullDES

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

fast ordering pics helped.

Fast delivery !

Great price

I looked on Amazon for a light to match one that was damaged on my tractor. Found one here that matched it exactly! UPS delivered it two days later, couldn't be happier!

easy - nice site

Easy and quick

Good

great pricing

Great parts

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 :)

Really good prices and fast delivery.

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

Best price on the internet. A lot cheaper than amazon, so I was pretty surprised.

Ordered a CTEK charger. Great price, and recieved it in 3 days. Very pleased.

Great prices

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.

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