Supertech Honda B18C5/B18C1/B17A/B16A/B15A 12.09mm OD Exhaust Valve Guide - Set of 8

This set includes eight exhaust valve guides from Supertech, specifically made for Honda B18C5, B18C1, B17A, B16A, and B15A engines. These guides are crucial for proper valve operation, ensuring the valve moves smoothly within the cylinder head and maintains a good seal.

These guides measure 12.09mm in outer diameter, which is an oversize dimension. This means they are intended for cylinder heads that have already been machined to accept this larger size, typically during an engine rebuild or repair where the original valve guide bores have been enlarged. Using the correct size guide is important for valve alignment and sealing, which directly impacts engine performance and oil consumption.