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Doug's Headers D317 Long Tube Exhaust Headers 1-3/4" Primary 3" Collector Small Block Chevy

(1962-1967 Chevrolet Nova Base; 1962-1967 Chevrolet Chevy II)

Manufacturer

Picture for manufacturer Doug's Headers

Part Number

D317
17 reviews
Sale Price

$1,098.81

1 left at this price

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Usually delivered within 2 days

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No Hassle Returns

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Live-in-stock inventory

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Fitment guaranteed

Fitment guaranteed

Product Details

The Doug's Headers D317 features 3/8" thick machined flanges to prevent warping, along with precision formed long transition collectors and long tube design that reduces backpressure and increases higher RPM horsepower. These headers feature 1-3/4" primary tube diameter with 16-gauge tubing construction, designed specifically for small block Chevrolet applications.

Key Features:

  • CNC mandrel bent tubes ensure accurate fit and better exhaust flow
  • 3/8" (0.38") thick machined flanges for superior durability
  • Heavy duty 16-gauge steel primary tubing for long service life
  • 3" collector diameter with 3-bolt flange attachment, includes collector reducers with 2.5" exit diameter
  • Tubes are pre-polished to remove scratches before applying metallic ceramic coating
  • Complete kit includes mounting bolts/studs and gaskets

Each Doug's header is tuned with the proper tube size and length to efficiently remove all exhaust from each cylinder, reducing pumping losses and resulting in dramatic increases in horsepower and torque. Since 1958, Doug's Headers has been producing high-quality, hand-built, mandrel-bent exhaust headers. Sold as a pair.

Note: Designed for use with Mustang II style front end conversions. This header does not fit manual transmissions.

Products specifications

Fits

1962-1967 Chevrolet Nova Base; 1962-1967 Chevrolet Chevy II

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

Silver 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

Prop 65

Yes

EmissionFullDES

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

Great website

Great

Fast action

Very easy to use, free shipping, A+

Good this far.

I just got it. Not sure about the rest. Thank you

So far so good

I have a MerCruiser 5.0 please make sure the proper cables are in this order

I haven't received my parts yet, but they just notified me that the order has been shipped. I think this is very fast service. Their online ordering system was very easy to use. And best of all, they had the lowest prices on the items I ordered. Even the shipping charge was less than some other companies. So far, I am very satisfied with Autoplicity, and I will certainly check their Website the next time I'm looking for parts.

Ordered on a Friday and they had it shipped by Monday and will be at my door step by Wednesday. Prices are amazing I will have to buy from them again.

Best prices, fast shipping, and product as described. I would definitely recommend Autoplicity.

Good

Great products. Super fast shipping,and best prices anywhere! Thx!!

Fast, Professional and great prices.

GREAT PRICES FAST SHIPPING WILL UPDATE ONCE PRODUCT ARRIVES

I enjoyed the quick and simple the checkout process

Autoplicity has really good service. They give you such good prices and yet they're still willing to give you discounts on your purchases. They emailed me a day later after purchase with shipping number. I would recommend them to anyone!

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