Top quality, U.K. made, extra thick headgasket. If you’re looking to lower your compression a bit due to pre-ignition, bad fuel or a sloppy mill job on your headgasket face this is the answer! This gasket is .120″ thick (stock is .048″). We salvaged a few heads that had been over machined with these that would otherwise have been useless. We also stock an .080″ thick gasket too.