My 1970 Satellite was finally pulled out of the garage for the first time in 5 years thismorning. Is having new front windshield installed and the original rear put back in. Next week the new exhaust goes in. From what I have read, and listened to, I've so far decided on a manifold back 2.5" dual exhaust with 40 Series Flowmaster mufflers. The part I'm not sure of is to go with either a simple single cross pipe, or a X style dual cross. Does anyone have any thoughts on either style, or the exhaust I've chosen? It's a stock 318, but will most certainly be upgraded in the future. I like an aggressive sound. Thoughts?
for a 318 go with the h pipe. X pipes boost HP at top end and H pipes boost low end torque.
TTI has manifold back kits that you will need to give them the exhaust manifolds numbers.
Aeon280’s post is accurate. But the difference is most minimal.
The main difference between the H and X pipe in sound is the X pipe’s sound will be the same sound and rhythm at the tail pipes exit. Like the same note on your stereo. It will be slightly smoother than an H pipe which will have an alternating pulse through each tail pipe exit. You’ll hear the firing order alternate from side
To side based on the bank it is firing on. The sound is a ever so slightly lumpy because the H pipe helps balance the pressure, not share it as in the X.
The H has a more typical 70’s/80’s sound your used to hearing. Aggressive. The mufflers you have chosen will have that aggressive sound.
If you move away from the exhaust manifolds in the future, I suggest 1 of 3 header manufactures.
Doug’s which is a straight 1-5/8 tube
TTI which is a stepped header 1-5/8 - 1-3/4
Hooker Super Comps which is a striaght 1-3/4 tube.
FWIW, the Hooker fits excellent. I have used this header on a small block B body before. It also fits E bodies. They only need a mod (or hammer) with a scattersheild. Excellent ground clearance.
Slightly cheaper than TTI.
