Speed Engineering LT Swap 1 7/8" Longtube Headers B-Body 1971-1996
Speed Engineering Gen V LT swap B-body longtube headers are built from natural 304 stainless steel with mandrel-bent, TIG-welded tubing, merge spikes and CNC-machined flanges.
- 1 7/8-inch primaries
- 3-inch collectors
- Longtube Gen V LT conversion design
- Fits 5.3L, 6.2L, 6.6L, LT1, LT4, L8T and L8P V8 engines
- Includes standard graphite manifold gaskets
Fits 1971-1996 Chevrolet Caprice, Impala and B-body applications. Part number: 25-1058. Requires clearance-style plug wires; some large-transmission bellhousing ears may require trimming, and LT4 installations may need an oil-cooler adapter or delete kit. Direct-injected LT swaps only. Race-use-only emissions 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.
For the most up-to-date order status or lead time questions, please contact sales@smgspeed.com or use live chat during business hours.