• Speed Engineering 1988-1998 Silverado Sierra 2WD C1500 LS swap 1-7/8 longtube headers X-pipe full kit 4.8 5.3 6.0 stainless exhaust system
    • Speed Engineering 1988-1998 Silverado Sierra 2WD C1500 LS swap 1-7/8 longtube headers X-pipe full kit 4.8 5.3 6.0 stainless exhaust system
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    Speed Engineering 1988–1998 Silverado / Sierra 2WD C1500 LS Swap 1-7/8" Longtube Headers & X-Pipe Full Kit (4.8L / 5.3L / 6.0L) 25-1137

    Vendor: Speed Engineering
    SKU: 25-1137
    $684.96
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    • Speed Engineering 1988-1998 Silverado Sierra 2WD C1500 LS swap 1-7/8 longtube headers X-pipe full kit 4.8 5.3 6.0 stainless exhaust system
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    Speed Engineering 1-7/8" Longtube Headers & X-Pipe Full Kit for 1988-1998 Silverado / Sierra 2WD C1500 LS Swap applications. 
    This complete bolt-on system replaces the restrictive factory exhaust manifolds and mid-pipes with free-flowing stainless longtubes and a 3" off-road X-pipe. Designed for significant horsepower gains, aggressive exhaust tone, and long-lasting durability.

    ⚠️ Note: Rear (downstream) O₂ sensors are not used. A check-engine light for catalyst efficiency will appear and must be disabled via PCM tuning.

    Kit Includes

    • (1) Pair of stainless steel 1-3/4" Longtube Headers
    • (1) 3" Off-Road X-Pipe / Connection Pipe
    • (1) Set of Zinc-Coated Header Bolts (or stainless ARP bolts if selected)
    • (2) MLS Exhaust Gaskets

    Plug Wires and Sleeves can be added to the kit if selected.

    Speed Engineering LS Swap Longtube headers are made out of 304 stainless steel and offer great quality, performance, and affordability. Our LS swap longtube headers are mandrel bent, tig welded, and feature natural stainless steel construction. All of our LS swap longtube headers have been dyno proven. We stand behind our LS swap longtube headers in saying you will not find a better fitting, quality built, budget header for your vehicle.

    Features include:

    • Great Fitment on the OBS Platform
    • Mandrel Bent Tubing
    • 1 7/8" Primaries
    • 3" Collector
    • Longtube Header Design
    • LS Swap Conversion Header
    • Merge Spikes
    • V8 LS Engines Only
    • 4.8L, 5.3L, 6.0L, 6.2L, LS1, LS2, LS3, LS6, LSA Engines
    • CNC Machined Flanges
    • Natural 304 Stainless Steel
    • Standard Graphite Manifold Gaskets

    Vehicle Applications:

    1988 Chevrolet C1500 Truck (2WD) 4.8L / 5.3L / 6.0L / 6.2L
    1989 Chevrolet C1500 Truck (2WD) 4.8L / 5.3L / 6.0L / 6.2L
    1990 Chevrolet C1500 Truck (2WD) 4.8L / 5.3L / 6.0L / 6.2L
    1991 Chevrolet C1500 Truck (2WD) 4.8L / 5.3L / 6.0L / 6.2L
    1992 Chevrolet C1500 Truck (2WD) 4.8L / 5.3L / 6.0L / 6.2L
    1993 Chevrolet C1500 Truck (2WD) 4.8L / 5.3L / 6.0L / 6.2L
    1994 Chevrolet C1500 Truck (2WD) 4.8L / 5.3L / 6.0L / 6.2L
    1995 Chevrolet C1500 Truck (2WD) 4.8L / 5.3L / 6.0L / 6.2L
    1996 Chevrolet C1500 Truck (2WD) 4.8L / 5.3L / 6.0L / 6.2L
    1997 Chevrolet C1500 Truck (2WD) 4.8L / 5.3L / 6.0L / 6.2L
    1998 Chevrolet C1500 Truck (2WD) 4.8L / 5.3L / 6.0L / 6.2L

    1988 GMC C1500 Truck (2WD) 4.8L / 5.3L / 6.0L / 6.2L
    1989 GMC C1500 Truck (2WD) 4.8L / 5.3L / 6.0L / 6.2L
    1990 GMC C1500 Truck (2WD) 4.8L / 5.3L / 6.0L / 6.2L
    1991 GMC C1500 Truck (2WD) 4.8L / 5.3L / 6.0L / 6.2L
    1992 GMC C1500 Truck (2WD) 4.8L / 5.3L / 6.0L / 6.2L
    1993 GMC C1500 Truck (2WD) 4.8L / 5.3L / 6.0L / 6.2L
    1994 GMC C1500 Truck (2WD) 4.8L / 5.3L / 6.0L / 6.2L
    1995 GMC C1500 Truck (2WD) 4.8L / 5.3L / 6.0L / 6.2L
    1996 GMC C1500 Truck (2WD) 4.8L / 5.3L / 6.0L / 6.2L
    1997 GMC C1500 Truck (2WD) 4.8L / 5.3L / 6.0L / 6.2L
    1998 GMC C1500 Truck (2WD) 4.8L / 5.3L / 6.0L / 6.2L

    Note: "Due to older vehicle frame clearance headers are pulled in very tight, and require our spark plug wires".

    Note: "For LS series engine swaps only" These do not work on standard SBC or BBC engines.

    Note: If using a larger 4L80E or older Turbo 350/400 transmission the bellhousing ears may need to be trimmed for proper clearance.

    Note: Would require adjustable motor mounts with 1" offset back.

    Note: "Does not fit 4wd"

    Note: This product with off road x pipe kit will need a modified or aftermarket crossmember for fitment on installation. This kit will work with Suspension Engineering transmission crossmember with required shims (4L60 will need 3 shims).

    (Warning) This is a RACE ONLY product manufactured and sold for installation on vehicles to be used solely for competition purposes. Once this part is installed, the vehicle may never be used, or registered or licensed for use, on a public road or highway. If you install this part on your vehicle and use the vehicle on a public road or highway, you will violate the Clean Air Act 203(a)(3), 42 U.S.C, 7522(a)(3) and may be subject to personal civil or criminal liability.

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    Disclaimer

    All products are sold for off-road use only unless otherwise specified. Buyer assumes all responsibility for installation and operation. Seller is not liable for any incidental, indirect, or consequential damages — including engine failure, labor costs, or vehicle downtime — resulting from the use of any product sold.

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