Shopping outside the US? International Shipping is now available!

×

APW Part Finder

Shop By Brand
Select Brand

Shop by Brand

Shop by Price

Shop by Series

Shop by Design

Shop by Quantity Sold

Shop by Recommended Use

COLLAPSE ALL

GMC S15 Headers

We have 2 Items In-stock. Select a year to continue.
  • Top Sellers
  • Shop By Category

GMC S15 Headers, Hedman Painted Hedders Headers - Black, Steel, 3-1, Direct Fit

Overstock
$238.79 $552.86 You Save $314.07 (57%)
Add to Cart
Availability: In Stock
(more)

HEDMAN – PAINTED HEDDERS

Is that power-robbing stock manifold still on your vehicle? If you answered yes, then replace it with a Hedman Painted Header to lower your operating temps and release extra horsepower and torque from your engine. These hedders are designed for painting, so order a can of header paint in the color that best suits your vehicle. Hedman Hedders have always been made in the USA since the company was founded over 50 years ago. Bob Hedman started out making hedders as a one man shop but word spread fast about the horsepower and torque that Hedman hedders were producing. His hedders have been in demand by top engine builders and racers since the start. Hedman’s time perfecting hedders on the track and on the dyno ensures you will get optimum performance with every Hedman Header whether it is installed on your race car or daily driver.

  • Perfect for hot rod builds on a tight budget
  • Proudly manufactured in U.S.A.
  • Tubing size is 16 to 18 gauge depending on model
  • Size of flanges are 5/16 inch
  • These hedders are designed to be painted, so pick up a can of header paint in a color of your choice

NOTE: Not legal for use or sale in California on vehicles that came equipped with emission controls from the factory.

  • Sku#: H5669400
  • Brand: Hedman
  • Series: Hedman Painted Hedders
  • Material: Steel
  • Design: 3-1
  • Color/Finish: Black
  • Emissions: 49-State Legal - no CA shipments
  • Product Fit: Direct Fit
  • Quantity Sold: Kit
  • Collector Attachment Style: Flange
  • Collector Diameter: 2.5 in.
  • Head Flange Thickness: 1/4 in.
  • Primary Tube Diameter: 1.5 in.
  • Numberof Cylinders: 6
  • Header Style: Long Tube
  • Bolts Studs Included: Yes
  • Gaskets Included: Yes
  • Primary Tube Thickness: 18 Gauge
  • Emissions Legality: 49-State Legal - no CA shipments
  • Anticipated Ship Out Time: 1-2 Business Days
  • Warranty: Lifetime Hedman limited warranty
See more

Fits the following GMC S15 Years

  • 1988 | Gypsy | 6 Cyl 4.3L
  • 1988-1990 | Base | 6 Cyl 4.3L
  • 1988-1990 | High Sierra | 6 Cyl 4.3L
  • 1988-1990 | Sierra Classic | 6 Cyl 4.3L
See more

GMC S15 Headers, Flowtech Shorty Headers - Black, Steel, 4-1, Direct Fit

Overstock
$177.95 $209.98 You Save $32.03 (15%)
Add to Cart
Availability: In Stock
(more)
FLOWTECH I STANDARD FULL-LENGTH HEADERS, STEEL, BLACK, SET OF 2 -- For off road use - Not legal for use on public roads and highways; 1.5 in. tube diameter, 16-gauge tube wall thickness, 2.5 in. weld-on collector, standard head flange; All mounting hardware such as bolts, nuts, and premium gasket are included; 4-1 design; Round head port; These headers are precision-engineered and leak-tested to provide the maximum performance and fuel efficiency of your engine; Formed from specially selected 0.049 cold roll flash controlled tubing with high quality electrostatically-applied satin black paint finish; They feature Flowtech's exclusive, thick, and mandrel-formed power plenum collector; All ports are precisely fitted and finished with sturdy and leaf-proof o-ringed port seals; Must modify stock exhaust to retain catalytic converter; Application with oxygen sensor use reducer part number 10105; Heap pipe lubrication required; Will not fit angle plug heads; Requires Flowtech front frame mount for installation.
  • Sku#: F3111502
  • Brand: Flowtech
  • Series: Flowtech Shorty
  • Material: Steel
  • Design: 4-1
  • Color/Finish: Black
  • Emissions: 49-State Legal - no CA shipments
  • Product Fit: Direct Fit
  • Quantity Sold: Set of 2
  • Recommended Use: Performance
  • Collector Attachment Style: Flanged
  • Collector Diameter: 2.5 in.
  • Head Flange Thickness: 5/16 in.
  • Port Shape: Round
  • Primary Tube Wall Thickness: 16-Gauge
  • Primary Tube Diameter: 1.5 in.
  • Numberof Cylinders: 8
  • Header Style: Long Tube
  • Bolts Studs Included: Yes
  • Gaskets Included: Yes
  • Anticipated Ship Out Time: 2-3 business days
  • Warranty: 90-day Flowtech warranty
See more

Fits the following GMC S15 Years

  • 1982 | Sierra Grande | 4 Cyl 1.9L
  • 1982 | Sierra Grande | 6 Cyl 2.8L
  • 1982-1985 | Base | 4 Cyl 1.9L
  • 1982-1985 | High Sierra | 4 Cyl 1.9L
  • 1982-1985 | Sierra Classic | 4 Cyl 1.9L
  • 1982-1990 | Base | 6 Cyl 2.8L
  • 1982-1990 | High Sierra | 6 Cyl 2.8L
  • 1982-1990 | Sierra Classic | 6 Cyl 2.8L
  • 1983-1984 | Base | 4 Cyl 2.0L
  • 1983-1984 | High Sierra | 4 Cyl 2.0L
  • 1983-1984 | Sierra Classic | 4 Cyl 2.0L
  • 1985-1990 | Base | 4 Cyl 2.5L
  • 1985-1990 | High Sierra | 4 Cyl 2.5L
  • 1985-1990 | Sierra Classic | 4 Cyl 2.5L
  • 1986-1988 | Gypsy | 4 Cyl 2.5L
  • 1986-1988 | Gypsy | 6 Cyl 2.8L
  • 1987 | EL | 4 Cyl 2.5L
  • 1987 | EL | 6 Cyl 2.8L
  • 1988 | Gypsy | 6 Cyl 4.3L
  • 1988-1990 | Base | 6 Cyl 4.3L
  • 1988-1990 | High Sierra | 6 Cyl 4.3L
  • 1988-1990 | Sierra Classic | 6 Cyl 4.3L
See more

GMC S15 Exhaust Manifold, Replacement Exhaust Manifold - Cast Iron, Direct Fit

Overstock
$94.74 $363.18 You Save $268.44 (74%)
Add to Cart
Availability: In Stock
Earn Double APW Rewards
Instead of 95,
EXHAUST MANIFOLD -- Cast iron construction; Tubular design; With wrap around heat shield; A high quality, direct fit OE replacement exhaust manifold; Made with durable, heat controlling materials for long-lasting life; Backed by 1-year, unlimited-mileage warranty.
  • Sku#: G960719
  • Brand: Replacement
  • Material: Cast Iron
  • Emissions: 48-State Legal (Cannot Ship to CA or NY)
  • Product Fit: Direct Fit
  • Quantity Sold: Sold Individually
  • Replaces OE Number: 10044282
  • Numberof Cylinders: 4
  • Anticipated Ship Out Time: 1-2 Business Days
  • Warranty: 1-year, unlimited-mileage warranty
  • Notes: Tubular design; With wrap around heat shield
See more

Fits the following GMC S15 Years

  • 1985-1990 | Base | 4 Cyl 2.5L
  • 1985-1990 | High Sierra | 4 Cyl 2.5L
  • 1985-1990 | Sierra Classic | 4 Cyl 2.5L
  • 1986-1988 | Gypsy | 4 Cyl 2.5L
  • 1987 | EL | 4 Cyl 2.5L
See more

GMC S15 Exhaust Manifold, Replacement Driver Side Exhaust Manifold - Cast Iron, Direct Fit

Overstock
$21.71 $88.71 You Save $67.00 (76%)
Add to Cart
Availability: In Stock
Earn Double APW Rewards
Instead of 22,
EXHAUST MANIFOLD -- Cast iron construction; A high quality, direct fit OE replacement exhaust manifold; Made with durable, heat controlling materials for long-lasting life; Backed by 1-year, unlimited-mileage warranty.
  • Sku#: REPC960703
  • Brand: Replacement
  • Location: Driver Side
  • Material: Cast Iron
  • Emissions: 48-State Legal (Cannot Ship to CA or NY)
  • Product Fit: Direct Fit
  • Quantity Sold: Sold Individually
  • Numberof Cylinders: 6
  • Aspiration Type: Naturally aspirated
  • Anticipated Ship Out Time: 1-2 Business Days
  • Warranty: 1-year, unlimited-mileage warranty
See more

Fits the following GMC S15 Years

  • 1986-1988 | Gypsy | 6 Cyl 2.8L
  • 1986-1990 | Base | 6 Cyl 2.8L
  • 1986-1990 | High Sierra | 6 Cyl 2.8L
  • 1986-1990 | Sierra Classic | 6 Cyl 2.8L
  • 1987 | EL | 6 Cyl 2.8L
See more

GMC S15 Exhaust Manifold, Replacement Driver Side Exhaust Manifold - Cast Iron, Direct Fit

Overstock
$79.45 $399.93 You Save $320.48 (80%)
Add to Cart
Availability: In Stock
Earn Double APW Rewards
Instead of 79,
EXHAUST MANIFOLD -- Cast iron construction; A high quality, OE replacement exhaust manifold; Made with durable, heat controlling materials for long-lasting life; Backed by 1-year, unlimited-mileage warranty.
  • Sku#: G960722
  • Brand: Replacement
  • Location: Driver Side
  • Material: Cast Iron
  • Emissions: 48-State Legal (Cannot Ship to CA or NY)
  • Product Fit: Direct Fit
  • Quantity Sold: Sold Individually
  • Replaces OE Number: 12553194
  • Numberof Cylinders: 6
  • Anticipated Ship Out Time: 1-2 Business Days
  • Warranty: 1-year, unlimited-mileage warranty
See more

Fits the following GMC S15 Years

  • 1988 | Gypsy | 6 Cyl 4.3L
  • 1988-1990 | Base | 6 Cyl 4.3L
  • 1988-1990 | High Sierra | 6 Cyl 4.3L
  • 1988-1990 | Sierra Classic | 6 Cyl 4.3L
See more

Select more GMC S15 parts under Headers, Manifolds & Components from list below.

Need Help? Get everything right and save time

Shop Gmc S15 Headers Call our auto parts experts at   or get an expert recommendation via Live Chat

Our Advantage

Free Shippingon orders $50 and above

Copyright ©1995-2014 Auto Parts Warehouse. All Rights Reserved.
Please read Auto Parts Warehouse's Updated Privacy Policy

Hide
  • Instagram