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GMC R3500 Headers

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GMC R3500 Headers, Gibson Performance Headers - Natural, Stainless Steel, 4-1, Direct Fit

$423.60 $803.68 You Save $380.08 (47%)
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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#: G27GP100S
  • Brand: Gibson
  • Series: Gibson Performance
  • Material: Stainless Steel
  • Design: 4-1
  • Color/Finish: Natural
  • Emissions: 50-State Legal
  • 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 Tuned
  • Includes: Premium gasket, installation hardware
  • Numberof Cylinders: 8
  • Port Shape: Round
  • Primary Tube Diameter: 1.5 in.
  • Primary Tube Thickness: 16 Gauge
  • Primary Tube Wall Thickness: 16-Gauge
  • Warranty: Lifetime Gibson limited warranty
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Fits the following GMC R3500 Years

  • 1988-1989 | High Sierra | 8 Cyl 5.7L
  • 1988-1989 | Sierra Classic | 8 Cyl 5.7L
  • 1988-1991 | Base | 8 Cyl 5.7L
  • 1990-1991 | SLE | 8 Cyl 5.7L
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GMC R3500 Headers, Hedman Painted Hedders Headers - Black, Steel, 4-1, Direct Fit

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$207.68 $441.42 You Save $233.74 (53%)
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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
  • Series: Hedman Painted Hedders
  • Material: Steel
  • Design: 4-1
  • 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
  • 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: 1.63 in.
  • Primary Tube Thickness: 18 Gauge
  • Primary Tube Wall Thickness: 18-gauge
  • Warranty: Lifetime Hedman limited warranty
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Fits the following GMC R3500 Years

  • 1988-1989 | High Sierra | 8 Cyl 5.7L
  • 1988-1989 | Sierra Classic | 8 Cyl 5.7L
  • 1988-1991 | Base | 8 Cyl 5.7L
  • 1990-1991 | SLE | 8 Cyl 5.7L
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GMC R3500 Headers, Flowtech Shorty Headers - Silver Ceramic, Steel, 4-1, Direct Fit

$311.95 $368.10 You Save $56.15 (15%)
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FLOWTECH II FULL-LENGTH HEADERS, SILVER LUSTER CERAMIC-COATED -- 49-state legal; Not for sale or use in California; Cannot be shipped to California addresses; Legal only for off-highway or racing use and pre-emission-controlled motor vehicles or engines; 1.625 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; 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 NASA-developed silver luster ceramic coating for rust and corrosion resistance; 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; Will not fit angle plug heads; Will fit with OE factory equipped style transmission only; Catalytic converter compatible Y-Pipe available separately, add suffix Y to part number; With Flowtech's 90-day warranty.
  • Sku#: F3131504
  • Brand: Flowtech
  • Series: Flowtech Shorty
  • Material: Steel
  • Design: 4-1
  • Color/Finish: Silver Ceramic
  • 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: Shorty
  • 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
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Fits the following GMC R3500 Years

  • 1988-1989 | Base | 8 Cyl 5.7L
  • 1988-1989 | High Sierra | 8 Cyl 5.7L
  • 1988-1989 | Sierra Classic | 8 Cyl 5.7L
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GMC R3500 Headers, Hooker Competition Headers - Black, Steel, 4-1, Direct Fit

$246.95 $291.40 You Save $44.45 (15%)
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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.
  • Sku#: H262462
  • Brand: Hooker
  • Series: Hooker Competition
  • Material: Steel
  • Design: 4-1
  • Color/Finish: 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: 4-5 business days
  • Collector Attachment Style: Flange
  • Collector Diameter: 2.5 in.
  • Equal Length Primary Tubes: Yes
  • Head Flange Style: Standard
  • Head Flange Thickness: 0.31 in.
  • Includes: Gasket(s)
  • Numberof Cylinders: 8
  • Port Shape: SAP
  • Primary Tube Diameter: 1.63 in.
  • Primary Tube Wall Thickness: 16-Gauge
  • Warranty: Hooker limited warranty
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Fits the following GMC R3500 Years

  • 1988-1989 | Base | 8 Cyl 5.7L
  • 1988-1989 | High Sierra | 8 Cyl 5.7L
  • 1988-1989 | Sierra Classic | 8 Cyl 5.7L
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GMC R3500 Headers, Patriot Headers - Metallic ceramic coated, Steel, 4-1, Direct Fit

$439.95 $655.45 You Save $215.50 (33%)
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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; 1.75 in. tube diameter, 3 in. collector; Includes gaskets, hardware, collector reducers, and installation instructions; Full-length style; SAP port shape; 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; Big block frame stands and motor mounts must be used to insure proper engine location and header fit; Non-catalytic converter equipped; Reducers available with oxygen sensor fitting.
  • Sku#: P1RH80541
  • Brand: Patriot
  • Material: Steel
  • Design: 4-1
  • Color/Finish: Metallic ceramic coated
  • Emissions: 49-State Legal - no CA shipments
  • Product Fit: Direct Fit
  • Quantity Sold: Kit
  • Anticipated Ship Out Time: 8-9 business days
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Fits the following GMC R3500 Years

  • 1987 | Base | 6 Cyl 4.8L
  • 1987 | Base | 8 Cyl 5.7L
  • 1987 | Base | 8 Cyl 6.2L
  • 1987 | Base | 8 Cyl 7.4L
  • 1987 | High Sierra | 6 Cyl 4.8L
  • 1987 | High Sierra | 8 Cyl 5.7L
  • 1987 | High Sierra | 8 Cyl 6.2L
  • 1987 | High Sierra | 8 Cyl 7.4L
  • 1987 | Sierra Classic | 6 Cyl 4.8L
  • 1987 | Sierra Classic | 8 Cyl 5.7L
  • 1987 | Sierra Classic | 8 Cyl 6.2L
  • 1987 | Sierra Classic | 8 Cyl 7.4L
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