LS1 Exhaust Manifold Block Off Plates These plates are used to prevent contaminants from entering your engine during removal, washing, painting, or for storage. Includes o-ring seals for a water tight seal
- Fits: all GM LS series engines
- Includes: 4 plates, 8 orings and mounting bolts
- Made in Wichita, KS from aerospace grade, USA billet aluminum
