the Race X Manifold boasts a 25% larger core

Ferrea valve springs are meticulously heat-treated and stress-relieved

MUST Sleeve the cylinders

8L DOHC high performance engine from the Honda B-series family

0" Axle-Back

Genuine BMW Rear Main Seal, BMW S58 11317563663 the Race X Manifold boastsThe rear main seal, also known as the rear crankshaft seal, is a crucial component in an engine. Genuine BMW Part Number: 11148664904 Purpose 1. Prevents Oil Leaks: The primary function of the rear main seal is to prevent engine oil from leaking out of the rear end of the crankshaft. It seals the gap between the crankshaft and the engine block or the transmission housing, ensuring that the oil remains within the engine. 2. Maintains Oil Pressure: By