[quote=AN]
I can see low 300WHP being reliable, but I’m very skeptical of a stock 4 banger being able to push over 500WHP on stock block & head. Even EVOs have to start getting head work to breath better and sleeves to strengthen the combustion chamber when you start to push around 400WHP.[/quote]
You are absolutely right, the 500whp was the beer talking. There are a lot over 400 with stock internals, but the 500+ need a little more to be safe and are probably on an ethanol mix. Also probably a lot more of those out of state than here in car enthusiast hell.
