You should get working the head OUT of your head. The stock head has made 300whp NA, There are only a handful of shops around that I know how to improve them and have numbers to prove it.Originally Posted by JRDman
You should get working the head OUT of your head. The stock head has made 300whp NA, There are only a handful of shops around that I know how to improve them and have numbers to prove it.Originally Posted by JRDman