• Speed Engineering LS swap 1-5/8 shorty headers 1982 2004 S10 Blazer LS1 LS3 LSA stainless exhaust conversion
    • Speed Engineering LS swap 1-5/8 shorty headers 1982 2004 S10 Blazer LS1 LS3 LSA stainless exhaust conversion

    Speed Engineering 1-5/8" LS Swap Shorty Headers — 1982–2004 Chevrolet S10, S10 Blazer, GMC Sonoma/Jimmy & Oldsmobile Bravada | LS1/LS2/LS3/LS6/LSA | 25-1039

    Vendor: Speed Engineering
    SKU: 25-1039
    $199.99
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    • Speed Engineering LS swap 1-5/8 shorty headers 1982 2004 S10 Blazer LS1 LS3 LSA stainless exhaust conversion
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    Swapping an LS into your S10, S10 Blazer, Sonoma, Jimmy, or Bravada? Speed Engineering's 1-5/8" LS swap shorty headers are engineered specifically for these compact GM truck platforms — stepping it up over competitors with V-band collector construction, merge spikes, and port-matched flanges for improved fitment and a cleaner installation. Compatible with the full LS engine family from 4.8L through 6.2L including LS1, LS2, LS3, LS6, and LSA. Dyno proven to deliver over 18 rear-wheel horsepower over stock manifolds.

    Built from 304 natural stainless steel with standard graphite manifold gaskets included.

    ⚠️ Important Installation Notes:

    • 2WD applications only — will NOT fit 4x4 applications
    • LS swap applications only — these headers are NOT compatible with standard SBC or BBC engines
    • Spark plug wires required — Speed Engineering spark plug wires or a similar designed wire will be needed for proper clearance
    • 4L80E or older Turbo 350/400 transmission — bellhousing ears may need to be trimmed for proper clearance
    • Aftermarket oil pans — collector may need modification for compatibility with some aftermarket oil pans

    Features:

    • Full 1-5/8" Port-Matched Primary Tubes — Full-diameter flow from cylinder head to collector
    • 2.5" V-Band Collector with Merge Spike — V-band construction for a cleaner, more secure collector connection over standard band clamp designs
    • Shorty Header Design — Improved flow over stock manifolds with a compact fitment-friendly profile
    • Mandrel Bent Tubing — Consistent tube diameter throughout; no crimping, no restriction
    • CNC Machined Flanges — Precision fit at the cylinder head for a leak-free seal
    • 304 Natural Stainless Steel Construction — Corrosion resistant, heat tolerant, and built to last
    • Standard Graphite Manifold Gaskets Included
    • Dyno Proven — 18+ RWHP gain on LS swap applications
    • Compatible with 4.8L, 5.3L, 6.0L, 6.2L, LS1, LS2, LS3, LS6, and LSA Engines
    • V8 LS Engines Only

    Vehicle Applications:

    Note: All applications listed are LS swap conversions. 2WD applications only — will NOT fit 4x4 trucks or SUVs.

    Chevrolet S10 Truck (2WD) — LS Swap

    • 1982 Chevrolet S10 Truck (2WD) — LS Swap
    • 1983 Chevrolet S10 Truck (2WD) — LS Swap
    • 1984 Chevrolet S10 Truck (2WD) — LS Swap
    • 1985 Chevrolet S10 Truck (2WD) — LS Swap
    • 1986 Chevrolet S10 Truck (2WD) — LS Swap
    • 1987 Chevrolet S10 Truck (2WD) — LS Swap
    • 1988 Chevrolet S10 Truck (2WD) — LS Swap
    • 1989 Chevrolet S10 Truck (2WD) — LS Swap
    • 1990 Chevrolet S10 Truck (2WD) — LS Swap
    • 1991 Chevrolet S10 Truck (2WD) — LS Swap
    • 1992 Chevrolet S10 Truck (2WD) — LS Swap
    • 1993 Chevrolet S10 Truck (2WD) — LS Swap
    • 1994 Chevrolet S10 Truck (2WD) — LS Swap
    • 1995 Chevrolet S10 Truck (2WD) — LS Swap
    • 1996 Chevrolet S10 Truck (2WD) — LS Swap
    • 1997 Chevrolet S10 Truck (2WD) — LS Swap
    • 1998 Chevrolet S10 Truck (2WD) — LS Swap
    • 1999 Chevrolet S10 Truck (2WD) — LS Swap
    • 2000 Chevrolet S10 Truck (2WD) — LS Swap
    • 2001 Chevrolet S10 Truck (2WD) — LS Swap
    • 2002 Chevrolet S10 Truck (2WD) — LS Swap
    • 2003 Chevrolet S10 Truck (2WD) — LS Swap
    • 2004 Chevrolet S10 Truck (2WD) — LS Swap

    GMC Sonoma Truck (2WD) — LS Swap

    • 1982 GMC Sonoma Truck (2WD) — LS Swap
    • 1983 GMC Sonoma Truck (2WD) — LS Swap
    • 1984 GMC Sonoma Truck (2WD) — LS Swap
    • 1985 GMC Sonoma Truck (2WD) — LS Swap
    • 1986 GMC Sonoma Truck (2WD) — LS Swap
    • 1987 GMC Sonoma Truck (2WD) — LS Swap
    • 1988 GMC Sonoma Truck (2WD) — LS Swap
    • 1989 GMC Sonoma Truck (2WD) — LS Swap
    • 1990 GMC Sonoma Truck (2WD) — LS Swap
    • 1991 GMC Sonoma Truck (2WD) — LS Swap
    • 1992 GMC Sonoma Truck (2WD) — LS Swap
    • 1993 GMC Sonoma Truck (2WD) — LS Swap
    • 1994 GMC Sonoma Truck (2WD) — LS Swap
    • 1995 GMC Sonoma Truck (2WD) — LS Swap
    • 1996 GMC Sonoma Truck (2WD) — LS Swap
    • 1997 GMC Sonoma Truck (2WD) — LS Swap
    • 1998 GMC Sonoma Truck (2WD) — LS Swap
    • 1999 GMC Sonoma Truck (2WD) — LS Swap
    • 2000 GMC Sonoma Truck (2WD) — LS Swap
    • 2001 GMC Sonoma Truck (2WD) — LS Swap
    • 2002 GMC Sonoma Truck (2WD) — LS Swap
    • 2003 GMC Sonoma Truck (2WD) — LS Swap
    • 2004 GMC Sonoma Truck (2WD) — LS Swap

    Chevrolet S10 Blazer (2WD) — LS Swap

    • 1982 Chevrolet S10 Blazer (2WD) — LS Swap
    • 1983 Chevrolet S10 Blazer (2WD) — LS Swap
    • 1984 Chevrolet S10 Blazer (2WD) — LS Swap
    • 1985 Chevrolet S10 Blazer (2WD) — LS Swap
    • 1986 Chevrolet S10 Blazer (2WD) — LS Swap
    • 1987 Chevrolet S10 Blazer (2WD) — LS Swap
    • 1988 Chevrolet S10 Blazer (2WD) — LS Swap
    • 1989 Chevrolet S10 Blazer (2WD) — LS Swap
    • 1990 Chevrolet S10 Blazer (2WD) — LS Swap
    • 1991 Chevrolet S10 Blazer (2WD) — LS Swap
    • 1992 Chevrolet S10 Blazer (2WD) — LS Swap
    • 1993 Chevrolet S10 Blazer (2WD) — LS Swap
    • 1994 Chevrolet S10 Blazer (2WD) — LS Swap
    • 1995 Chevrolet S10 Blazer (2WD) — LS Swap
    • 1996 Chevrolet S10 Blazer (2WD) — LS Swap
    • 1997 Chevrolet S10 Blazer (2WD) — LS Swap
    • 1998 Chevrolet S10 Blazer (2WD) — LS Swap
    • 1999 Chevrolet S10 Blazer (2WD) — LS Swap
    • 2000 Chevrolet S10 Blazer (2WD) — LS Swap
    • 2001 Chevrolet S10 Blazer (2WD) — LS Swap
    • 2002 Chevrolet S10 Blazer (2WD) — LS Swap
    • 2003 Chevrolet S10 Blazer (2WD) — LS Swap
    • 2004 Chevrolet S10 Blazer (2WD) — LS Swap
    • 2005 Chevrolet S10 Blazer (2WD) — LS Swap

    GMC Jimmy (2WD) — LS Swap

    • 1982 GMC Jimmy (2WD) — LS Swap
    • 1983 GMC Jimmy (2WD) — LS Swap
    • 1984 GMC Jimmy (2WD) — LS Swap
    • 1985 GMC Jimmy (2WD) — LS Swap
    • 1986 GMC Jimmy (2WD) — LS Swap
    • 1987 GMC Jimmy (2WD) — LS Swap
    • 1988 GMC Jimmy (2WD) — LS Swap
    • 1989 GMC Jimmy (2WD) — LS Swap
    • 1990 GMC Jimmy (2WD) — LS Swap
    • 1991 GMC Jimmy (2WD) — LS Swap
    • 1992 GMC Jimmy (2WD) — LS Swap
    • 1993 GMC Jimmy (2WD) — LS Swap
    • 1994 GMC Jimmy (2WD) — LS Swap
    • 1995 GMC Jimmy (2WD) — LS Swap
    • 1996 GMC Jimmy (2WD) — LS Swap
    • 1997 GMC Jimmy (2WD) — LS Swap
    • 1998 GMC Jimmy (2WD) — LS Swap
    • 1999 GMC Jimmy (2WD) — LS Swap
    • 2000 GMC Jimmy (2WD) — LS Swap
    • 2001 GMC Jimmy (2WD) — LS Swap
    • 2002 GMC Jimmy (2WD) — LS Swap
    • 2003 GMC Jimmy (2WD) — LS Swap
    • 2004 GMC Jimmy (2WD) — LS Swap
    • 2005 GMC Jimmy (2WD) — LS Swap

    Oldsmobile Bravada (AWD) — LS Swap

    • 1991 Oldsmobile Bravada (AWD) — LS Swap
    • 1992 Oldsmobile Bravada (AWD) — LS Swap
    • 1993 Oldsmobile Bravada (AWD) — LS Swap
    • 1994 Oldsmobile Bravada (AWD) — LS Swap
    • 1995 Oldsmobile Bravada (AWD) — LS Swap
    • 1996 Oldsmobile Bravada (AWD) — LS Swap
    • 1997 Oldsmobile Bravada (AWD) — LS Swap
    • 1998 Oldsmobile Bravada (AWD) — LS Swap
    • 1999 Oldsmobile Bravada (AWD) — LS Swap
    • 2000 Oldsmobile Bravada (AWD) — LS Swap
    • 2001 Oldsmobile Bravada (AWD) — LS Swap

    Frequently Asked Questions:

    Q: Will these headers fit my 4x4 S10 or Blazer? No. These headers are designed for 2WD applications only and will not fit 4x4 trucks or SUVs.

    Q: What is the difference between this listing and the 1-3/4" S10/Blazer shorty headers (25-1161)? The primary tube diameter and collector size are the key differences. The 1-3/4" headers (25-1161) use larger primaries and a 3" V-band collector for improved flow at higher RPM and on larger displacement LS engines. These 1-5/8" headers use a 2.5" V-band collector — a strong choice for mild builds and applications where even tighter clearance is needed.

    Q: Why do these headers have a V-band collector instead of a standard band clamp? V-band collector construction provides a more secure, cleaner connection compared to standard band clamp designs. It also makes removal and reinstallation easier and reduces the chance of exhaust leaks at the collector joint.

    Q: Will these headers work with my SBC or BBC engine? No. These headers are designed for LS series engine swaps only and are not compatible with standard small block Chevy or big block Chevy engines.

    Q: Do I need special spark plug wires? Yes. Speed Engineering spark plug wires or a similar designed wire will be needed for proper clearance with these headers.

    Q: Will these work with my aftermarket oil pan? The collector may require modification for compatibility with some aftermarket oil pans. Verify your specific application before ordering.

    Q: Will these fit with a 4L80E or older Turbo 350/400 transmission? These headers may require trimming of the bellhousing ears on 4L80E or older Turbo 350/400 transmissions for proper clearance.

    Q: What LS engines are these headers compatible with? These headers are compatible with GM LS V8 engines including 4.8L, 5.3L, 6.0L, 6.2L, LS1, LS2, LS3, LS6, and LSA.

    Q: How much horsepower do these headers add? Speed Engineering's 1-5/8" LS swap shorty headers are dyno proven to add over 18 rear-wheel horsepower compared to stock manifolds on LS swap applications.

    Q: What material are these headers made from? 304 natural stainless steel with full TIG-welded construction, CNC-machined port-matched flanges, and a V-band collector with merge spike.

    Q: Are gaskets included? Yes. Standard graphite manifold gaskets are included with the headers.

    Q: Are these headers street legal? No. These are race-only headers intended for closed-course competition use only. Installation on a street-driven vehicle may violate the Clean Air Act (42 U.S.C. 7522(a)(3)).

    ⚠️ Race Use Only: This product is manufactured and sold for installation on vehicles used solely for competition. Once installed, the vehicle may not be used, registered, or licensed for use on a public road or highway. Installation on a street-driven vehicle may violate the Clean Air Act 203(a)(3), 42 U.S.C. 7522(a)(3).

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