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GMC S15 Headers

We have 5 Items In-stock. Select a year to continue.
$238.79 List Price $552.86 Save $314.07 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#: H5669400
  • Brand: Hedman
  • Fit Note: RWD, For Hydraulic Clutch Only
  • 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 S15 Years:
  • 1988-1990 | 6 Cyl 4.3L | Base, High Sierra, Sierra Classic
  • 1988 | 6 Cyl 4.3L | Gypsy
$177.95 List Price $209.98 Save $32.03 Availability: In Stock
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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
  • Fit Note: RWD, Without A.I.R. Tubes, For Engine 283-400 Swap, RWD, Without A.I.R. Tubes, Required A/C Bracket PN[10042FLT], RWD
  • Emissions: 49-State Legal - no CA shipments
  • Product Fit: Minor Modifications
  • Quantity Sold: Kit
  • Anticipated Ship Out Time: Same day - 1 business day
 
Fits the following GMC S15 Years:
  • 1988-1990 | 6 Cyl 4.3L | Base, High Sierra, Sierra Classic
  • 1985-1990 | 4 Cyl 2.5L | Base, High Sierra, Sierra Classic
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$94.74 List Price $363.18 Save $268.44 Availability: In Stock
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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
  • Anticipated Ship Out Time: 1-2 Business Days
  • Notes: Tubular design; With wrap around heat shield
  • Number of Cylinders: 4
  • Replaces OE Number: 10044282
  • Warranty: 1-year, unlimited-mileage warranty
 
Fits the following GMC S15 Years:
  • 1985-1990 | 4 Cyl 2.5L | Base, High Sierra, Sierra Classic
  • 1986-1988 | 4 Cyl 2.5L | Gypsy
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$21.71 List Price $88.71 Save $67.00 Availability: In Stock
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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
  • Quantity Sold: Sold Individually
  • Anticipated Ship Out Time: 1-2 Business Days
  • Aspiration Type: Naturally aspirated
  • Number of Cylinders: 6
  • Warranty: 1-year, unlimited-mileage warranty
 
Fits the following GMC S15 Years:
  • 1986-1990 | 6 Cyl 2.8L | Base, High Sierra, Sierra Classic
  • 1986-1988 | 6 Cyl 2.8L | Gypsy
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$79.45 List Price $399.93 Save $320.48 Availability: In Stock
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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
  • Quantity Sold: Sold Individually
  • Anticipated Ship Out Time: 1-2 Business Days
  • Number of Cylinders: 6
  • Replaces OE Number: 12553194
  • Warranty: 1-year, unlimited-mileage warranty
 
Fits the following GMC S15 Years:
  • 1988-1990 | 6 Cyl 4.3L | Base, High Sierra, Sierra Classic
  • 1988 | 6 Cyl 4.3L | Gypsy
Select more GMC S15 parts under Headers, Manifolds & Components from list below.