I am going to put my 406 in my 89 T/A, I have long tubes on my my 88 and true duals. I am going with single exhaust due to the 89 is a much nicer car and I don't want to sacrifice ground clearance. I thought about going with the mufflex y pipe and their cat back. The thing is I would really like to lower the car. I know I can't have every thing, and I know I am going to loose some power. I am thinking about using SLP 1 3/4 shorty headers and a custom 2.5 or 3.in y pipe to either a 3.5 or 4in cat back. I know deadbird here in town makes some mean *** custom exhaust systems and I need to talk to him about it.

I don't know how much power i'd loose with 1 3/4 shortys, thats why I wanting a big y pipe to try to make up for the lack of collector length.

Thanks.

 

ttt

 

While I don't have any idea how much, if any, power you'd lose with shorties vs. LT's, I'd say you've got the right idea about the 1-3/4" primaries and a good y-pipe.