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The Gen 3 Billet lid also features 1/8" npt fittings above each cylinder which allow for easy plumbing of direct port meth/nitrous
Stage 3/4 camshafts in LSA/LS9 engines do not pull enough vacuum to open the OEM bypass valve all the way
Consistent Performance: Helps maintain maximum boost levels by reducing belt slip at wide open throttle and in between shifts
so they run a little on the small side
Edelbrock Heat Exchanger (Fits ZR1) 2650 The Gen 3 Billet lidFull face design provides 31,000 btu hr. of heat transfer. This exchanger is a single pass, single row fin design with a 3 4'' barbed inlet and outlet. It also features eight M6x1. 0 threaded bungs, one at every corner, for easy installation. Dimensions: 22'' x 16. 5'' x 1. 5''