S/B BBC chevy w/2-piece rear main seal. Billet steel flexplates 168 tooth, zero balanced 6 bolt flange works with TH350, TH 400, 700 R4, 4L60E, 4L80E. Meets requirements for SFI 29.2 certification, built from premium billet forged steel for ultimate strength, precision balanced, and a black epoxy painted finish for corrosion resistance. Recommended for vehicles up to 3500hp and max. Engine RPM of 12,500rpm. Please e-mail with questions.