Check out the Warp 6 canted-valve cylinder head from KRE. Read more only at www.highperformancepontiac.com, the official website for High Performance Pontiac Magazine!

The Pontiac 455 debuted for the 1970 model year with 10.25:1 compression, which is obviously a bit high for an iron-headed pump-gas engine today. When compression ratios began to drop in 1971, the ...

In 1973, Pontiac introduced the ultimate evolution of the 455, dubbed the SD-455, with a strengthened block, forged rods and pistons, round port cylinder heads, and a more aggressive camshaft with ...