Speed Engineering LS Swap 1 7/8" Longtube Headers - G-Body & OBS 2WD
Speed Engineering 25-1137 1 7/8-inch LS-swap longtube headers. Speed Engineering currently publishes this same SKU for 1982-1987 GM G-Body applications and 1988-1998 Chevrolet/GMC C1500 2WD OBS trucks. Mandrel-bent, TIG-welded 304 stainless construction with 3-inch collectors, merge spikes, CNC-machined flanges, and included graphite gaskets.
These tight-clearance headers require heat-resistant plug wires. Choose SMG LS MLS gaskets, SMG 9070C ceramic plug wires, or both. The ceramic wires are the only set used on SMG in-house header builds. LS-swap and 2WD/source-specific installation restrictions apply. Race-use product.
Processing & Shipping Overview
Processing occurs before shipping.
Most in-stock items typically process within 2–3 business days before shipment or pickup. Expedited shipping options affect transit time after an order ships and do not speed up processing.
Made-to-order, special-order, vendor drop-ship, and freight items require additional processing time before shipping. Any extended lead times will be noted on the product page when applicable.
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