1982-2004

For LS1 in S-10 and Blazer.

Very tight fit and good plug access.

Includes all hardware necessary for installation.

Fits 4.8, 5.3, 6.0 Vortec engines and LS1, LS6, LS2, LS7

1-5/8" Primary Tubes

3/8" Flanges

18 Gauge Tubing

2 1/2" Collector (collector already fitted for 02 sensor)

Note most other brands are 1 1/2" NOT 1 5/8"