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GMC R3500 Headers

We have 5 Items In-stock. Select a year to continue.
$394.10 List Price $672.53 Save $278.43 Availability: In Stock
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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
  • SKU#: G27GP100
  • Brand: Gibson
  • Fit Note: RWD, Without Air Injection, Will Not Fit Vehicle With Dual Air Fitting, Will Not Fit On Old Body Style
  • Color/Finish: Chrome
  • Emissions: 50-State Legal
  • Product Fit: Direct Fit
  • Quantity Sold: Kit
  • Anticipated Ship Out Time: Same day - 1 business day
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Fits the following GMC R3500 Years:
  • 1990-1991 | 8 Cyl 5.7L | SLE
  • 1988-1991 | 8 Cyl 5.7L | Base
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Rating: (see review/s)

"Im happy with the headers I got they work great. But Im looking to see how do I clean them" posted by: on November 3, 2013

$207.68 List Price $441.42 Save $233.74 Availability: In Stock
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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#: H5669440
  • Brand: Hedman
  • Fit Note: RWD
  • Color/Finish: Black
  • Emissions: 49-State Legal - no CA shipments
  • Product Fit: Direct Fit
  • Quantity Sold: Kit
  • Anticipated Ship Out Time: 1-2 Business Days
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Fits the following GMC R3500 Years:
  • 1990-1991 | 8 Cyl 5.7L | SLE
  • 1988-1991 | 8 Cyl 5.7L | Base
(see more)
$377.55 List Price $572.70 Save $195.15 Availability: In Stock
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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.
  • SKU#: P1RH80481
  • Brand: Patriot
  • Emissions: 49-State Legal - no CA shipments
  • Product Fit: Direct Fit
  • Quantity Sold: Kit
  • Anticipated Ship Out Time: 2-3 business days
 
Fits the following GMC R3500 Years:
  • 1987 | 8 Cyl 7.4L | Base, High Sierra, Sierra Classic
$146.95 List Price $173.40 Save $26.45 Availability: In Stock
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FLOWTECH I STANDARD FULL-LENGTH HEADERS, SATIN BLACK HI-TEMPERATURE PAINTED -- 49-state legal; Not for sale or use in California; Cannot be shipped to California addresses; 1.5 in. tube diameter, 16-gauge tube wall thickness, 3 in. weld-on collector, standard head flange; All mounting hardware such as bolts, nuts, and premium gasket are included; Full-length style; 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 0.060 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 converters; Applications with oxygen sensor use reducer part number 10105 for 2.5 in. 3-bolt flange or part number 10110 for 3 in. 3-bolt flange; It is necessary to remove the rubber stopper below the starter on 83-84 4WD; Pre-70 vehicles with exhaust manifold mounted alternator/generator use bracket part number 10031FLT; May require clutch linkage modifications; Fits C30 crew cab type chassis only; Will not fit angle plug heads; Also available with A.I.R. injection manifold welded in place.
  • SKU#: F3111500
  • Brand: Flowtech
  • Fit Note: Crew Cab Pickup, RWD, Automatic Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Required A/C Bracket PN[10042FLT], Crew Cab Pickup, RWD, Standard Transmission, Without A.I.R. Tubes, With Oxy. Sensor, Use Reducer PN[10105FLT] For 2.5 in Flange, Required A/C Bracket PN[10042FLT], RWD, Automatic Transmission, Without A.I.R. Tubes Required A/C Bracket PN[10042FLT], RWD, Standard Transmission, Without A.I.R. Tubes Required A/C Bracket PN[10042FLT]
  • Color/Finish: Black
  • Emissions: 49-State Legal - no CA shipments
  • Product Fit: Minor Modifications
  • Quantity Sold: Kit
  • Anticipated Ship Out Time: Same day - 1 business day
(see more)
Fits the following GMC R3500 Years:
  • 1990-1991 | 8 Cyl 5.7L | SLE
  • 1987-1991 | 8 Cyl 5.7L | Base
(see more)
Rating: (see review/s)

"I ordered my headers one day and recieved them about 2 days later. They were easy to install and the fit was an exact match to my truck. The only problem I had was the cheap made gaskets for my headers. After install I had an exhaust leak that I couldn't get rid of." posted by: on November 16, 2008

$232.74 List Price $274.63 Save $41.89 Availability: In Stock
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HOOKER COMPETITION HEADER, BLACK HIGH TEMPERATURE PAINT -- Tube Size 1.625 x 27 O.D, Collector Size 2.5 O.D, Collector Length 8, Port Shape Same As Port, Will Not Fit Angle Plug Heads, Tuned-Length Primary Tubes For Street Performance, Mandrel-Bent Tubing For Smooth Exhaust Flow, Light Weight And Sturdy 16 Gauge Tubing, Long Transition Collector For Decreased Back Pressure, 5/16” Machined Flanges For A Perfect Seal, All Necessary Hardware Included For A Complete Installation
  • SKU#: H262452
  • Brand: Hooker
  • Fit Note: Crew Cab Pickup, Automatic Transmission, Reducers Available With Oxygen Sensor PN[11045HKR/11046HKR], Legal Only For Off-Highway/Racing Use, Crew Cab Pickup, Standard Transmission, Reducers Available With Oxygen Sensor PN[11045HKR/11046HKR], Legal Only For Off-Highway/Racing Use, Reducers Available With Oxygen Sensor PN[11045HKR/11046HKR], Legal Only For Off-Highway/Racing Use
  • Color/Finish: Black
  • Emissions: For off road/track use
  • Product Fit: Direct Fit
  • Quantity Sold: Kit
  • Anticipated Ship Out Time: 1-2 Business Days
(see more)
Fits the following GMC R3500 Years:
  • 1990-1991 | 8 Cyl 5.7L | SLE
  • 1987-1991 | 8 Cyl 5.7L | Base
(see more)
Rating: (see review/s)

"Just as advertised. good price good shipping same item arrived that I ordered I am very happy with the service and product." posted by: rickygster on December 21, 2007

Select more GMC R3500 parts under Headers, Manifolds & Components from list below.