head only skim if its warped/not flat, otherwise xpayah
Oh, I actually thought is needed since I've read before over here that when doing overhaul, should skim the head. But I guess they refer about performance rather than necessity, hahahahaha.Like bro. lsm1991 mentioned no need. Skim only if overheated and warped. Simply skim increase the compression later need higher ron....lol