This is for a New Old Stock, Discontinued Weiand Small Block Chevrolet, Chevy, Aluminum Intake Manifold Model 7546. This model is designed for square-bore carburetors in 1957 to 1986 with 262, 265, 267, 283, 302, 307, 327, 350 and 400 CID Small Block Chevrolet engines and 1987-91 SBC engines equipped with L98 aluminum Corvette cylinder heads, (non-EGR applications). It will also will work with ... Weiand X-CELerator Intake - Chevy Small Block V8 - IMCA. X-CELerator Intake Manifold IMCA Approved 1957-1986 262ci-400ci, 1987-later with Aluminum Heads, IMCA Legal. PART# 7547-1. Be the first to write a review. $245.00 Suggested Retail $197.96 Holleydays Price Estimated shipping date: 01/15/2021 ...Weiand became the first OE supplier of superchargers to Mercury Performance Marine in 1990, and over the next three years the "Stealth" series of high performance dual plane manifolds was designed, the "Pro-Street" supercharger was certified "emissions legal" by CARB and Weiand received the industry's first "E.O." for an intake manifold.