Please post results of tried & 'tested' results and findings from grooved volvo heads. Although results /findings will be subjective, it will help to show the general beneits /shortfalls of grooving.
Please avoid general comments & discussions or questions in this thread.
Posts from actual Grooved users only please.
General Discussion can be done here -
http://forums.turbobricks.com/showthread.php?t=66779