[Shotimes] Walker cat-back smaller than expected.

[Justin Schick]

Speaking from experience, you definitely do not want to go without a resonator, unless you're looking for the buzzing Honda kind of sound. I had my system ran without one at first, and I was barely down the road before turning around to arrange appointment #2 to install a glasspack where the resonator used to be.

I would go to a shop that can do mandrel bends, or if none are available buy the bends you need before heading to the shop.



Justin Schick
silver 92 SHO in KC MO
201k and counting quickly

>>> "Michael" <molsen@excite.com> 01/12/04 02:57PM >>>
 Hi, I just realized, after having used it for 4y now, that the Walker/Dynomax cat-back is actually only a 2.25" system, and not a 2.5" system as I had thought all along. Also, the output pipe of the HiFlow cat is only 2.25". According to some flowdata that I saw, a 2.25" single-pipe system will definately restrict the flow of even a slightly modified SHO. Not by a lot, but it's not optimal.This latest "revelation" makes me wanna try to make a custom 2.5" exhaust system as follows: 1. move the rear cat 6" further back to optimize its position. (Apparantly, 12-18" from the exhaust manifold opening is optimal for a 2.25" cat.)2. replace the two rear cat pipes with 2.5" pipes.3. make a more tapered merging of the two rear cat pipes.4. drop the resonator.Have any of you done something similar? Any comments appreciated. I expect to gain about 5HP from this. I like the single-pipe configuration, and don't wanna go to dual-pipes. Dual-pipes is too much work, and the consensus, I be!
lieve, is that I would loose too much back pressure and thus torque at low-RPM. Michael94MTX,green,BOS+