Quad Exit BMW 3-Series (G20) Rear Panel Diffuser Model_430i (G22) Coupe 20> features a 13mm hex and

features a 13mm hex and OE Tool cavity

The real difference is when driving and you actually get the bangs/cracks out of the exhaust under load (and at lower revs than before) and the downshifts are spot on

Sound - Engine at Idle: 70dB (+12

This is a performance induction kit for the E46 3 Series

Quad Exit BMW 3-Series (G20) Rear Panel Diffuser Model_430i (G22) Coupe 20> features a 13mm hex andFits: G20 Saloon Models with M Sport bodykit. This lower rear diffuser panel fits G20 models and attaches directly to the OEM fitting points of the M Sport rear bumper. Specifically designed to be fitted in conjunction with the Cobra Sport quad exit performance exhaust conversions for the BMW 3 series. This lower rear diffuser panel allows the conversion of the G20 models to a quad exit exhaust system and fits directly to the OEM fitting points of the