Supertech BMW B48/B58 42x10.045 (+0.015)x4.985mm Intake Valve Guide - Single (Drop Ship Only)

If you're rebuilding the top end of your BMW B48 or B58 engine, you'll need to replace the valve guides. This intake valve guide from Supertech is a direct replacement for your original part, but it's made to a slightly larger size to account for wear or for a tighter fit during a performance build.

This guide measures 42mm in length, with a 10.045mm outer diameter and a 4.985mm inner diameter. It's specified as being 0.015 inches oversize, which means it's designed to press-fit into a cylinder head that has been machined to accept this slightly larger dimension. Supertech is known for making well-built engine components, and these guides are no exception, offering a solid option for your engine work.