Quote Originally Posted by dakilla4ever
DC headers won't be a good choice? And what would the pistons raise the compression up to? What numbers would that put out? I really want to get ready for autocross.
with a h22 dc is the worse choice you can make. The runners and collectors are the same if not smaller than the stock ones are. its the worse way to invest 2-400 bux or however much the dc header cost.

The type s pistons are 11:1 compression pistons. If you plan on building the head then you can mill the head a little bit and you gain rough ~.2 to ~.5 more in Compression. That should put you at about ~11.5ish compression. Which is not bad for a n/a build on pump gas btw.

numbers? from the dynoes I've seen depending on how healthy the motor is you'll in the 200whp ball park. Might be a little higher.