a few days ago i saw a buddy of mine with a weird exhaust set up he used a switch to go from stock exhaust to open header. Now i was wondering how he did that, he wont tell me how it was done cause hes a *cough* but i know some one out there i mean in here should know about this ? thank you and have a nice day

 

http://www.dmhperformance.com/ecutout.htm

 

How good are those things? It's like all of a suddenly they're all super popular an ****. Is there any actual dyno proven gains with this things or is it just for show with sound??

 

man thats dumb just tell your muffler shop to weld on a flange you you can unscrew it and be open headers.