What you want to do is what I did on my 95. 2 1/4 is just right and can be
flared to mate up with your JBAs quite nicely. I used a 2 1/4x2 1/4 x 3"
Flowmaster aluminized Y-pipe into a 3" high flow cat then three inch all the
way out with the muffler of your choice(I used a Flowmaster Big Block). This
combo hooked up to the stock manifolds was worth 3 1/2 to 4 tenths in
quarter mile ETs. Good luck.
Andre Mauboussin
95 Dakota 14.70 @93.5mph
Bob Mankin wrote:
> OK gang, with the JBAs now in place, the next stop for me is a cat back
> system. I'm leaning toward an Ultra Flo muffler and will probably just
> buy it locally and have the shop custom bend the tailpipes.
>
> As I mentioned in an earlier post, my Y pipe is a 1.75" mandrel bent
> number that expands to a 2.25" pipe flowing into and out of the cat.
> There is a 2 foot or so length of pipe between the Y pipe and the cat.
> What I'm thinking about is this:
>
> Ditch the existing Y pipe for a 2.25" piece that dumps to a 3" collector
> going to a high flow cat. Past that I'm not sure just yet. I will either
> go for the 3" all the way back or possibly a dual 2.25" tailpipe setup.
> I'm going for the Super Truck look(Xenon ground effects in the future)
> so that's the reason for the uncertainty on the pipe exits.
>
> My concerns are: Will the 2.25" Y pipe be too much? My stock cat seems
> to be quite a ways back from the collector. Is this normal? I'm thinking
> that any cat back system is suffering to some degree by having 2 feet or
> better of small tubing in front of the cat. I can't understand exactly
> why it's placed where it is(behind the tranny Xmember) when there is
> room forward of that. Concerns over heating the passenger side floor or
> maybe the tranny itself?
>
> Any thoughts?
>
> Bob
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 12:09:27 EDT