cross posting since its on topic...
http://www.1addicts.com/forums/showt...1#post14554841
Quote:
Originally Posted by CarJunkie
Harold has a link to the before and after dyno for the MadDad here:
http://www.hpashop.com/MadDad-EuroSp...midpipe-1m.htm
n55 should be similar, maybe a little less. They have smaler diameter pipe, but the secondary cat delete is where most of the difference is made. The MadDad's seem to help from about 3k rpm's and up. It would be nice to see some independent examples verifying this. |
^^Thanks for posting that link. This kind of confirms my butt dyno in that the N55 mids while increasing mid and top end power
you do loose some low end grunt in the 2K to 3K range. That was one reason why when I installed my PE I went back to N54 mids with the secondary cats.