Review: SuperSprint Twin tube (2x 2.5") Section 2

[Arith2]

You are way off on your numbers

pi/4 * 3.375^2 = 8.84sqin
pi/4 * 2.375^2 *2 = 8.85

My phone is not calculating properly. I dug through some boxes and found my old TI-84 which does work properly. I finally got something with similar numbers to yours. It's really frustrating my numbers were so off. You definitely got the right answer.

[PSUEng]

Chiming in on this as I'm looking to get into the SS GB for the 63.5mm system--great thread. From what I read it seems that the 63.5mm section 2 is only really necessary if you are running high HP and other mods like cams, CSL intake, etc.?

My car is totally stock and I'm not chasing high HP, I just need to replace my stock manifolds (bad cats) and pass emissions. For an otherwise stock setup, if I run the 63.5mm manifolds (044001) and 63.5mm catted section 1 (044002), and stock section 2 and rear muffler, is that going to work just fine? Of course, I'd like the full system but cost is a factor. Seems the cats will bolt right up to the Sec2.

Any thoughts are welcome!

[Tbonem3]

The stock sect 2 is a great piece, and it will never be a problem running one, even on a FBO car. Remember, the SS 2.5" is exactly the same as the stock piece, just 3.5mm or 1/8" large diameter.

[PSUEng]

The stock sect 2 is a great piece, and it will never be a problem running one, even on a FBO car. Remember, the SS 2.5" is exactly the same as the stock piece, just 3.5mm or 1/8" large diameter.

Thanks for the feedback--but if I did run the 63.5mm sec2, would I lose power?

[Tbonem3]

No. I have most bolt on mods, no cams, and I felt a little more grunt. I think Hassan demonstrated an 8whp delta but that was with 280 cams iirc.

The aftermarket sect 2s that lose midrange power are the Y pipe aka "Xpipe" style with no crossover.

[c watson]

Chiming in on this as I'm looking to get into the SS GB for the 63.5mm system--great thread. From what I read it seems that the 63.5mm section 2 is only really necessary if you are running high HP and other mods like cams, CSL intake, etc.?

My car is totally stock and I'm not chasing high HP, I just need to replace my stock manifolds (bad cats) and pass emissions. For an otherwise stock setup, if I run the 63.5mm manifolds (044001) and 63.5mm catted section 1 (044002), and stock section 2 and rear muffler, is that going to work just fine? Of course, I'd like the full system but cost is a factor. Seems the cats will bolt right up to the Sec2.

Any thoughts are welcome!

I have euro headers, euro cats (sec 1), and a scza. I didn’t like the rasp from that setup so I went with the dual resonated SS section 2. It quieted the car a not but I literally have zero rasp! The butt dyno is also very impressed.