The F4.1 hauls!

[hwrd442]

Ran an F4.1 for the first time on Byron 30%. It hauls ass pretty damn good. Seems to have more than enough torque and top end.

 

[Sparky]

Remove 1 headshim and it'll have a lot more power on 30%

 

[hwrd442]

Are the head shims the same thickness?

 

[Sparky]

There are usually 3 in stock form,
I’d remove all but the thickest one,
Power will be way up.