LS Swap, Primary Tube Diameter 1-5/8", Collector Diameter 2-1/2", Natural
Specifications:
- Header style: Shorty
- Primary tube diameter: 1-5/8 in
- Collector diameter: 2 in
- Flange: 3-bolt
- Material: Stainless Steel
- Finish: Natural
- Engine: GM
- Mounting hardware and gaskets included
- CARB (California) emissions compliant: No
- Part number: 11578FLT
Vehicle Applications:
- 1991 Chevrolet S10 Baja
- 1982-2003 Chevrolet S10
- 1982-1990 Chevrolet S10 Durango
- 1992-1993 Chevrolet S10 EL
- 1994-2004 Chevrolet S10 LS
- 1991-1993 Chevrolet S10 Maxi
- 1982-1989 Chevrolet S10 Sport
- 1994-1998 Chevrolet S10 SS
- 1982-1992 Chevrolet S10 Tahoe
- 1999-2003 Chevrolet S10 Xtreme
- 1994-2003 Chevrolet S10 ZR2
- 2002-2004 Chevrolet S10 ZR5
- 1982-1990 GMC S15
- 1987 GMC S15 EL
- 1982-1990 GMC S15 High Sierra
- 1982-1990 GMC S15 Sierra
- 1982 GMC S15 Sierra Grande
- 1991-2004 GMC Sonoma
- 1992 GMC Sonoma GT
- 1993-2004 GMC Sonoma SLS
Grouped by model; fits 157 individual year/make/model configurations in total.
FAQ
What vehicles does the Flowtech 11578FLT header fit?
It fits 1991 Chevrolet S10 Baja; 1982 Chevrolet S10 Base; 1983 Chevrolet S10 Base; 1984 Chevrolet S10 Base; 1985 Chevrolet S10 Base; 1986 Chevrolet S10 Base; and 151 more configurations. See the Vehicle Applications list for the full fitment.
Are mounting hardware and gaskets included?
Yes. Flowtech supplies the mounting hardware and header gaskets for installation.
Is this header legal in California?
Flowtech lists this part as not CARB (California) emissions compliant. Confirm your local emissions requirements before purchase.
What finish is this header?
Natural.

