Need new exhaust 05 5.9 cat back. Looking at MBRP 4" S6108409 T409 Stainless Steel Single Side Exit
Magnaflow 17956 Pro Series Stainless 5" they are about the same price on amazon.com 406.00 404.00 witch one would be better. wayne

 

If you're looking to make more than 500hp then get the 5 inch.

Otherwise stick with the 4 inch.




Kris

 

I just put the 4" aluminized MBRP on my 05 3 weeks ago. Went on nice and easy. I went with the aluminized since 1 the first one lasted 5 years, so I should get 5 out of this one and that several post discussed that the low grade of SS did not last as well. The 304 is the best but it will cost a little more.