Originally Posted by qtiger
No, you're not. You're going to blow $600 + and a weekend of labor on something that may net you 5 hp if you're lucky.
That same time and money spent on better/more turbo parts, or good boost control, or tuning would net you more hp.
You certainly don't need new springs or valves for 290 hp.
I'm not spending $600+...
I'm buying a d16y8 for $100
Die Grinder and bits for $30
Omni Valves for $175
Head Gasket for $70
$375 for even 5whp is decent. I already have my valvetrain and cam upgraded. Also I plan to port match my IM and header.