Shopping outside the US? International Shipping is now available!

×

APW Part Finder

Shop By Brand
Select Brand

GMC R2500 Headers

We have 5 Items In-stock. Select a year to continue.
  • Top Sellers
  • Shop By Category

GMC R2500 Headers, Gibson Performance Headers - Chrome, Mild Steel, 4-1, Direct Fit

$493.73 $672.53 You Save $178.80 (27%)
Add to Cart
Availability: In Stock
Only from APW Rewards
GIBSON – PERFORMANCE HEADERS

Gibson’s Performance Headers are proven to increase horsepower by an impressive 20 hp and torque by as much as 30 lbs – a significant boost whether you’re on the track or the street. Gibson is known as the leading manufacturer of street-legal, high performance exhaust systems for trucks, SUVs, diesels, off-road vehicles and RVs.

  • Designed to replace factory exhaust manifold and utilize factory cross-over pipes
  • Streamlines air flow
  • Thick, 3/8” heavy-duty laser-cut flanges will not warp or leak - guaranteed
  • Choose ceramic coat, nickel-plated or stainless steel finish
  • Backed by a lifetime warranty
  • No welding required – easy to bolt-on
  • Engine lasts longer because it operates at cooler temperatures
  • Improved efficiency also directly improves gas mileage
  • Proven to improve torque by up to 30 lbs and horsepower up to 20 hp
  • Direct fit by vehicle year, make and model
  • Designed and manufactured in the USA
  • Brand SKU#: Gibson GP100
  • Series: Gibson Performance
  • Material: Mild Steel
  • Design: 4-1
  • Color/Finish: Chrome
  • Emissions: 49-State Legal - no CA shipments
  • Product Fit: Direct Fit
  • Quantity Sold: Kit
  • Anticipated Ship Out Time: 1-2 Business Days
  • Bolts Studs Included: Yes
  • Collector Attachment Style: OE Style Flange
  • Collector Diameter: Stock
  • Equal Length Primary Tubes: No
  • Gaskets Included: Premium Carbon Composite Gasket
  • Head Flange Style: Stock
  • Head Flange Thickness: 3/8 in.
  • Header Style: Shorty
  • Includes: Head gasket, washers, nuts, bolts, exhaust donut
  • Numberof Cylinders: 8
  • Port Shape: Round
  • Primary Tube Diameter: 1 1/2 in.
  • Primary Tube Thickness: 14 Gauge
  • Primary Tube Wall Thickness: 14-gauge
  • Warranty: Lifetime Gibson limited warranty
See more

Fits the following GMC R2500 Years

  • 1988-1989 | Base | 8 Cyl 5.7L
  • 1988-1989 | High Sierra | 8 Cyl 5.7L
  • 1988-1989 | Sierra Classic | 8 Cyl 5.7L
See more
Customer Review: (see review/s)

GMC R2500 Headers, Hedman Painted Hedders Headers - Painted Black, Steel, 4-1, Direct Fit

Best Seller
$198.31 $441.42 You Save $243.11 (55%)
Add to Cart
Availability: In Stock
Only from APW Rewards

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.

  • Brand SKU#: Hedman 69440
  • Series: Hedman Painted Hedders
  • Material: Steel
  • Design: 4-1
  • Color/Finish: Painted Black
  • Emissions: 49-State Legal - no CA shipments
  • Product Fit: Direct Fit
  • Quantity Sold: Kit
  • Anticipated Ship Out Time: 1-2 Business Days
  • Bolts Studs Included: Yes
  • Collector Attachment Style: Flange
  • Collector Diameter: 3 in.
  • Emissions Legality: 49-State Legal - no CA shipments
  • Equal Length Primary Tubes: Yes
  • Gaskets Included: Yes
  • Head Flange Style: Standard
  • Head Flange Thickness: 1/4 in.
  • Header Style: Long Tube
  • Includes: Premium gasket, installation hardware
  • Numberof Cylinders: 8
  • Port Shape: Round
  • Primary Tube Diameter: 1 5/8 in.
  • Primary Tube Thickness: 18 Gauge
  • Primary Tube Wall Thickness: 18-gauge
  • Warranty: Lifetime Hedman limited warranty
See more

Fits the following GMC R2500 Years

  • 1988-1989 | Base | 8 Cyl 5.7L
  • 1988-1989 | High Sierra | 8 Cyl 5.7L
  • 1988-1989 | Sierra Classic | 8 Cyl 5.7L
See more

GMC R2500 Headers, Patriot Headers - Ceramic Coated, Steel, 4-1, Direct Fit

$377.55 $572.70 You Save $195.15 (34%)
Add to Cart
Availability: In Stock
Only from APW Rewards
PATRIOT SPECIFIC FIT HEADERS, METALLIC CERAMIC-COATED, SET OF 2 -- 49-state legal; Not for sale or use in California; Cannot be shipped to California addresses; 1.625 in. tube diameter, 3 in. collector; Includes gaskets, hardware, collector reducers, and installation instructions; Full-length style; Oval port shape; Features ceramic coated tubing that is corrosion and rust resistant; Lowers under hood temperatures for more power and extended product life; Easy to maintain; It has thick machined flanges for great seal; Its high flow mandrel-bent mild steel tubing provides greater horsepower and torque; Fits D-port cylinder heads including ZZ4 crate engines; Will fit most angle plug heads; Non-catalytic converter equipped; Reducers available with oxygen sensor fitting; Installation requires left side A/C bracket part number H7608; 1979 and later vehicles with short compressors can use the stock bracket.
  • Brand SKU#: Patriot H80481
  • Material: Steel
  • Design: 4-1
  • Color/Finish: Ceramic Coated
  • Emissions: 49-State Legal - no CA shipments
  • Product Fit: Direct Fit
  • Quantity Sold: Kit
  • Anticipated Ship Out Time: 2-3 business days
  • Collector Diameter: 3 in.
  • Header Style: Long Tube
  • Primary Tube Diameter: 1 5/8 in.
See more

Fits the following GMC R2500 Years

  • 1987 | Base | 8 Cyl 5.0L
  • 1987 | Base | 8 Cyl 5.7L
  • 1987 | Base | 8 Cyl 6.2L
  • 1987 | Base | 8 Cyl 7.4L
  • 1987 | High Sierra | 8 Cyl 5.0L
  • 1987 | High Sierra | 8 Cyl 5.7L
  • 1987 | High Sierra | 8 Cyl 6.2L
  • 1987 | High Sierra | 8 Cyl 7.4L
  • 1987 | Sierra Classic | 8 Cyl 5.0L
  • 1987 | Sierra Classic | 8 Cyl 5.7L
  • 1987 | Sierra Classic | 8 Cyl 6.2L
  • 1987 | Sierra Classic | 8 Cyl 7.4L
See more

GMC R2500 Headers, Flowtech Mid-Length Headers - Painted Black, Steel, 4-1, Direct Fit

Best Seller
$153.95 $181.66 You Save $27.71 (15%)
Add to Cart
Availability: In Stock
Only from APW Rewards

FLOWTECH – MID-LENGTH HEADERS

Flowtech’s Mid-length headers use Mandrel-bent 16-gauge tubing for smooth-flowing power and are shaped to give your vehicle the maximum amount of ground clearance. Designed to install easily, they use machined flanges for a precise fit and the O-ring port seals have been leaked tested so you can enjoy trouble-free performance. You can improve the power and sound on your street machine with Flowtech’s wide range of performance exhaust products.

  • 16-gauge tubing is strong and light
  • O-ring port seals are leak tested
  • Smooth Mandrel bends for exhaust velocity
  • Comes finished in black paint or a heat-resistant ceramic coating
  • Flanges are machined to prevent leaks
  • High-flowing Power Plenum collectors
  • The ideal length to create ground clearance
  • Brand SKU#: Flowtech 11504FLT
  • Series: Flowtech Mid-Length
  • Material: Steel
  • Design: 4-1
  • Color/Finish: Painted Black
  • Emissions: 49-State Legal - no CA shipments
  • Product Fit: Direct Fit
  • Quantity Sold: Set of 2
  • Recommended Use: Performance
  • Anticipated Ship Out Time: 3-4 business days
  • Bolts Studs Included: Yes
  • Collector Attachment Style: Flanged
  • Collector Diameter: 3 in.
  • Equal Length Primary Tubes: Yes
  • Gaskets Included: Yes
  • Head Flange Style: Standard
  • Head Flange Thickness: 5/16 in.
  • Header Style: Mid-Length
  • Includes: Gasket(s)
  • Numberof Cylinders: 8
  • Port Shape: Round
  • Primary Tube Diameter: 1 5/8 in.
  • Primary Tube Wall Thickness: 16-Gauge
  • Warranty: 90-day Flowtech warranty
See more

Fits the following GMC R2500 Years

  • 1988-1989 | Base | 8 Cyl 5.7L
  • 1988-1989 | High Sierra | 8 Cyl 5.7L
  • 1988-1989 | Sierra Classic | 8 Cyl 5.7L
See more

GMC R2500 Headers, Hooker Competition Headers - Painted Black, Steel, 4-1, Direct Fit

$246.95 $291.40 You Save $44.45 (15%)
Add to Cart
Availability: In Stock
Only from APW Rewards
HOOKER COMPETITION FULL-LENGTH HEADERS, BLACK HI-TEMPERATURE PAINT -- 1.625 in. tube diameter, 16-gauge tube wall thickness, 2.5 in. flange collector, 8 in. collector length, 0.3125 in. standard head flange; They include all the necessary hardware for complete installation; Sap shape port; Full-length style; They feature tuned-length primary tubes for maximum exhaust scavenging and velocity, light but sturdy 16-gauge mild steel mandrel-bent tubing for smooth exhaust flow, long transition collector for decreased back pressure, and machined flanges for a perfect seal; Designed for optimal performance and industry's best welds for durability; Exhaust systems can also be fabricated using either Hooker Super Competition Aero Chamber mufflers, Maximum Flow mufflers, Super Competition turbo mufflers, Competition turbo mufflers or header type Hooker mufflers; Equipped with a fitting to accept the stock oxygen sensor; With Hooker's limited warranty.
  • Brand SKU#: Hooker 2462HKR
  • Series: Hooker Competition
  • Material: Steel
  • Design: 4-1
  • Color/Finish: Painted Black
  • Emissions: Not Street Legal In Ca Or Any State Adopting Ca Emissions - Intended For Closed Circuit Competition Use Only
  • Product Fit: Direct Fit
  • Quantity Sold: Kit
  • Anticipated Ship Out Time: 3-4 business days
  • Collector Attachment Style: Flange
  • Collector Diameter: 2 1/2 in.
  • Equal Length Primary Tubes: Yes
  • Head Flange Style: Standard
  • Head Flange Thickness: 0.31 in.
  • Header Style: Long Tube
  • Includes: Gasket(s)
  • Numberof Cylinders: 8
  • Port Shape: SAP
  • Primary Tube Diameter: 1 5/8 in.
  • Primary Tube Wall Thickness: 16-Gauge
  • Warranty: Hooker limited warranty
See more

Fits the following GMC R2500 Years

  • 1988-1989 | Base | 8 Cyl 5.7L
  • 1988-1989 | High Sierra | 8 Cyl 5.7L
  • 1988-1989 | Sierra Classic | 8 Cyl 5.7L
See more

Select more GMC R2500 parts under Headers, Manifolds & Components from list below.

Need Help? Get everything right and save time

Shop Gmc R2500 Headers Call our auto parts experts at   or get an expert recommendation via Live Chat

Our Advantage

Free Shippingon orders $50 and above

Copyright ©1995-2015 Auto Parts Warehouse. All Rights Reserved.
Please read Auto Parts Warehouse's Updated Privacy Policy

Hide