Radium 10AN Male Press-In Valve Cover Fitting RCM 5% these bushings can be installed

these bushings can be installed without removing the control arms

digital LED display and sweeping LED "needle" that changes colors as AFR changes from rich to lean

This image below shows a 2005 WRX with the bonnet scoop removed

With cracking around the spark plug thread a common problem on the later type Subaru cylinder heads

Radium 10AN Male Press-In Valve Cover Fitting RCM 5% these bushings can be installedRadium Engineering 10AN low profile swivel fittings simply press in. No drilling or welding required. There are multiple valve covers for Honda K series. They are all interchangeable. However, these Radium Engineering press in fittings are NOT compatible with the earlier valve cover which do NOT have an OEM press in fitting. FEATURES: Stainless Aluminum Construction Low Profile 10AN Male Fitting Anodized and Laser Engraved Swivel Action with FKM O