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.
- Brand SKU#: Flowtech 11500FLT
- Series: Flowtech Long Tube
- 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
- Anticipated Ship Out Time: 1-2 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: Long Tube
- Includes: Gasket(s)
- Numberof Cylinders: 8
- Port Shape: Round
- Primary Tube Diameter: 1.5 in.
- Primary Tube Wall Thickness: 16-Gauge
- Warranty: 90-day Flowtech warranty
Fits the following GMC V2500 Years
- 1987 | Base | 8 Cyl 5.7L
- 1987 | High Sierra | 8 Cyl 5.7L
- 1987 | Sierra Classic | 8 Cyl 5.7L