I'll be running in a class this year that requires stock replacement shorty headers, so spare me the long tube header stuff, I know. What I need some help deciding on is which shorty to run? No larger than 1-5/8", so no AFM headers for me. Are the stepped headers I've read about somewhere better than just a regular(BBK, MAC) unequal length shorties? I can't find the mag I had about them so somebody help me out here. Thanks.