Originally Posted by
Maximo
And here is a bone stock B5 with all the head shims still in engine on a 2013, Werk's #5 plug ( as most people run them ) vs my full mod B5 on a Werk's #6

WOW that is a huge gain! Even removing 1 shim makes a nice differance. So we can remove 1 shim in a stock B5 without any trouble?