Well im running 607hp on my 2L sr20 and my head is neither ported or polished!!!
Well im running 607hp on my 2L sr20 and my head is neither ported or polished!!!
10.5sec 1/4 mile @140mph Fastest s14 in Europe down 1/4 mile...
Theres no black and white answer, it depends on the engine, my B230FK got great gains from a port and polish on the head, manifolds and turbo.