ISU-WS6

So I'm going the dual route in the near future, but I am stuck in the classical "H or X?" question. I've done plenty of research into the topic, and I know the sound differences and scavenging differences. My problem deciding stems from the 11* of overlap that the ASA has. Would having the H-pipe and its supposed back pressure help boost my low end torque (which sucks with my 3.42s and all that overlap)? Or would I theoretically gain more power with the increased scavenging of the X due to a less contaminated cylinder charge from the scavenging sucking out the exhaust better? I want the H pipe sound, but performance is more important to me, and I could deal with the sound of an X. Any input would be appreciated.

ASA specs are 228/236 .525/.525 110 LSA

TSP 1-7/8 Headers as well

thunderstruck507

iTrader: (18)

You're talking about such a minute difference if you prefer the sound of the H just get the H.

Is there any specific reason you are going with the ASA cam if you say you're looking for the most power?

HCI2000SS

iTrader: (2)

I agree with thunderstruck. Go for sound since the power difference is negligible

ISU-WS6

I already have the ASA. I liked its specs and gentleness to the valve train. People criticize it, but it runs really well IMO.

ISU-WS6

I guess if it's that negligible, I'll just stick to H. Unless TSP has a sweet sale on their duals, then I could have them extended out the rear. Otherwise I'm having a custom setup built

thunderstruck507

iTrader: (18)

Not dissing it, especially if you already have it but things have come a long way since then too.

ISU-WS6

And I don't disagree at all. I sometimes wish I had gone with something better, maybe a custom grind. But with the budget I was on, and the LS6 springs I got for free, it was a good deal. It sounds nasty and I get plenty of compliments. I'm also a fan of factory style stuff, and with it being a GM product and used in some crate engines, I thought it was neat. I've also heard its a good nitrous cam.

SSCamaro99_3

iTrader: (1)

I would always do an X if it were me. Perhaps a small difference, but still a superior design.

Darth_V8r

iTrader: (4)

+1 for the X pipe. Personally I like the H sound, but I saw an exhaust article comparing the various arrangements and the X made the most power.

Priorities. Fast first, cool sound second.

ls1 1990 VN

H design is old school. Was done to help balance exhaust sound etc, These days we are far more advanced & get a better flow etc by using the X.

Go with the X

ISU-WS6

TSP usually has like a black Friday sale on their dual system dont they?

mfor1000

I ended up trying both the X and H pipes on my LS376/525 (LS3 with ASA cam). The X sounded modern and the H sounded much more old school and more like a race car. I chose the H because it is in an old muscle car and was more fun. I couldn't tell any difference in power., but I'm not racing that car either and am probably not very sensitive to it...good luck!

5.7stroker

iTrader: (36)

So what makes more power? Dual electric cutouts right after the headers and then close them when you want it quiet (use Y pipe, resonator in I Pipe and quiet flow muffler) or a full dual exhaust setup using an X?

HCI2000SS

iTrader: (2)

The cutout will make more power

ISU-WS6

Bump.

DavidBoren

Something I have been wondering about, is should you put your cutouts before, or after, the X-pipe?

Before it, negates the advantages of the scavenging pipe altogether, but provides quicker access to open environment for the exhaust.

After it, you get the full effects of the scavenging pipe, but a longer distance for the exhaust to travel before reaching open environment.

Which is correct?

SlasherVRGR

iTrader: (1)

I've always wondered this myself, and I'm sure someone has got to know the real answer.

I would think it would depend on application. If you have duals that are larger than needed I'm sure after the merge would be just as good if not better. But if you're pushing 500 HP through 2.5 in duals I'd think better gains would be had pre merge.

This is just my theory and I'm sure I'm probably in some way wrong.

Rise of the Phoenix

iTrader: (27)

X pipe all day on a LSx.

ISU-WS6

Bump.

DavidBoren

Bump? Why? Do you have new questions that need to be answered?

I feel that the original question was answered rather thoroughly, unless I'm missing something.

From a performance and efficiency standpoint, the X-pipe is the clear winner.

For old school muscle car noises, the H-pipe is the correct choice.

You should probably get the X-pipe for the power gains across the board, and new rear gears to aid in down low grunt.