Starting at Φ60.5 and ending at Φ80.0, the increased capacity is ideal for high performance tuning . Lightweight Titanium is used. With a base plate to distributes stress. Comes equipped with an A/F sensor boss for convenience when tuning.KIT CONTENTSSTRAIGHT PIPE / F(1)STRAIGHT PIPE / R(1)GASKET/F (1)GASKET/R (1)FLANGE BOLT M10 (2)FLANGE NUT M10 (2)CLUMP BAND (1)BOLT SMOOTH PASTE (1)