View Full Version : srt 8 ext

wrenchin hobo
07-28-2010, 08:44 PM
Ok, so here are my plans. I've spent a lot of time modding the srt 8 cars and jeeps and after comparing side by side the commander and srt I'm probably going to get the srt 8 manifolds and high flow cats. And then figure out something for the cat back.

I'll put it to you this way I have personally seen several cars just swapping to 6.1 manifolds from 5.7's and high flow cats with a tune picking up 30 ft lbs of torque to the wheels. That would probably be in the mid 20's range with he awd and all, but the extra mpg will be nice too. And not to mention sound.

And yes they do bolt up, however the 6.1 has a larger "D" shaped exhaust port as compared to the smaller square shaped port of our 5.7's. And yes you can enlarge the port of the 5.7 to match the 6.1 exhaust. I've seen it done on several cars. 5.7 heads ported are fairly cheep (compared to any of the modular ford junk) so I'll probably get some "econo" type ported heads with the exhaust opened up to the 6.1 style.

Any of you guys think of doing something similar???