Does anyone know if the hi flow cat converter they're selling on ebay help much with the horsepower or not? How much horsepower will it give me and will i notice the power difference? i know it's illegal in most places but i don't have to do an emission check where i live. you can check out the item at
http://cgi.ebay.com/ebaymotors/ws/eB...spagename=WDVW
thanks

 

High flow cats result in 1-2hp gain and that's if you're lucky and at the same time, it could be dyno error. You won't notice it at all.

~THT

 

Yea i have heard Nissan's cat in the max is already pretty open

 

it's gonna be a waste of money. spend your money somewhere else.