Correct, but the long tube headers with a decent 2in1out muffler will beat the results of any cat delete even that active exhaust cat delete will not beat a properly built long tube header. I have dyno results that show huge gains in long tube headers. See this thread:
http://forums.pelicanparts.com/porsche-911-technical-forum/1077817-84-89-3-2l-upgraded-3-5l-267-wheel-hp.html
and this one also:
http://forums.pelicanparts.com/porsche-911-technical-forum/962997-1984-911-3-4-sleeper-hotrod-end.html
It's expensive for the long tube headers and a decent muffler but worth every penny!
Quote:
Originally Posted by darrin
NeedAJoker -- believe Sal's point here is that SSIs do not provide any real upgrade over the stock 3.2 exhaust setup with a cat delete. Brian/M&K's active premuffler takes things a step beyond a cat delete as it (at least partially) bypasses the back pressure created downstream of the cat/premuffler by the muffler itself. And, the beautiful noise it creates at full throttle sure doesn't hurt on the "butt dyno" front. Here's a direct link to the M&k active premuffler https://mkexhaust.com/active-exhaust-with-pre-muffler/ |