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Doug's Headers D313 Long Tube Exhaust Headers Big Block Chevy 1-3/4" Primary Tube

(Chevrolet Camaro 1967-72, Corvette 1968-74, Impala 1968-74, Malibu 1965-67, 1973-76, Chevelle 1965-73, Caprice 1968-74, El Camino 1966-76 + 8 more models)

Manufacturer

Picture for manufacturer Doug's Headers

Part Number

D313
10 reviews
Sale Price

$897.71

2 left at this price

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Usually delivered within 2 days

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Fitment guaranteed

Fitment guaranteed

Product Details

Doug's Headers D313 long tube exhaust headers feature 3/8" thick machined flanges to prevent warping and precision formed long transition collectors that reduce backpressure while increasing higher RPM horsepower. These headers are tuned with the proper tube size and length to efficiently remove exhaust from each cylinder, reducing pumping losses and resulting in dramatic increases in horsepower and torque.

Key Features:

  • 3/8" thick machined flanges prevent warping under extreme heat
  • CNC mandrel-bent tubes provide accurate fit and improved exhaust flow
  • Heavy-duty 16-gauge steel tubing for extended service life
  • 1-3/4" (1.75") primary tube diameter for optimal exhaust velocity
  • 3" collector diameter with 3-bolt flange attachment
  • SAP (standard automotive port) cylinder head port shape compatibility
  • Tubes are pre-polished to remove scratches before coating application

The standard metallic ceramic thermal barrier coating (MCTBC) protects and extends header life by creating a thermal barrier that significantly lowers underhood temperatures and protects the substrate metal from thermal fatigue. Headers include all necessary mounting hardware, collector reducers or connector pipes, premium extra-thick gaskets rated to 1100°F, and detailed installation instructions.

Since 1958, Doug's Headers has been producing high-quality, hand-built, mandrel-bent exhaust headers that are carefully developed on the vehicles they are intended to fit and re-checked numerous times during the design and manufacturing process. Sold as a pair.

Products specifications

Fits

Chevrolet Camaro 1967-72, Corvette 1968-74, Impala 1968-74, Malibu 1965-67, 1973-76, Chevelle 1965-73, Caprice 1968-74, El Camino 1966-76, Monte Carlo 1970-74, Nova 1969-72, Chevy II 1968, Bel Air 1968-74, Biscayne 1969-70 + 3 more models

Bolts/Studs Included

Yes

Collector Attachment

3-bolt flange

Cylinder Head Port Shape

SAP

Flange Style

Standard

Flange Thickness (in)

3/8 in.

Header Finish

Ceramic coated

Header Material

Steel

Header Style

Full-length

Motor Mounts Included

No

Primary Tube Diameter (in)

1 3/4 in.

Primary Tube Gauge

16-gauge

Quantity

Sold as a pair.

Reducers Included

Yes

Transmission Mount Included

No

Tuned

No

Weld-Up

No

Y-Pipe Included

No

Finish

Metallic Ceramic Coated

EmissionFullDES

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

Prop 65

Yes

Always easy dealing with them

Excellent selection of products. Very competitive pricing. Thank you!

Easy to order from. Shipping time pretty good.

Great and easy experience.

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I paid for 2 Day Shipping, how soon will it ship?

Good fast shipping. Easy ordering.

User friendly site and easy checkout

Fantastic ! Ordered a Weather Tech Cargo Liner for my 2012 Ford Explorer. Price was $60 less here than ALL other sites on web. I was skeptical that this was going to be a counterfeit -- as the price was too good to be true. I was extremely happy to receive the genuine product as I expected in less than a week -- and for $60 less than the competitors ! GREAT VALUE and great service ! I will definitely be back !!

Wow Super fast shipping, right product, no hassle no fuss. just how i like it. good job autoplicity keep it up.

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