What do you guys use for a flange for re-using the 1g BOVs? I really don't want to step down to the stock size piping because the rest of my charge pipes are 2.5".

 

Just cut the flange off the stock piping and weld it to your new charge pipes.

 

Thanks, don't want to be a topic hog so I'll just ask my second question here. Is there a reason why a lot of people use HKS foam filters, I think I've seen them for around $12, would I be better off using an HKS over my K&N Cone filter?

 

get a flange from www.roadraceengineering.com for bov flange.