Anyone with DYNO results of removing H-Pipe?

[Pokageek]

Removing the factory catted pipe I mean. How about with mods like mine? Results?Thanks!

 

[burtonrider787]

I don't have any numbers, but when I removed my stock H-pipe for an off-road one I notice a big difference

 

[The Green GT]

I just put my O/R H on and with no mufflers either, I could DEFINATELY feel a difference.

But sorry, no numbers.

 

[JJ95GTID]

No actual dyno numbers but I do have track info. I went from a 14.623sec 1/4ET to 14.469sec 1/4ET with just the replacement of the stock 4 catted H-pipe to my current Pypes 2 catted X-pipe. I would be willing to say that 20-25hp is a safe bet.

 

[Pokageek]

Thanks. I went from the 4 catted to 2 catted H-pipe already and I am wondering what the difference would be between the 2 catted and no catted. I don't like the noise and the smell of the no cat. Well I do like the noise but I don't...mainly boominess. I am wondering if it is worth the trade-off.

 

[The Green GT]

Thanks. I went from the 4 catted to 2 catted H-pipe already and I am wondering what the difference would be between the 2 catted and no catted. I don't like the noise and the smell of the no cat. Well I do like the noise but I don't...mainly boominess. I am wondering if it is worth the trade-off.

When I had my cats on and no mufflers it was loud as hell. I replaced the H-Pipe with the O/R on and it was just OBSCENE. No cats will make it a hell of alot louder.

 

[94-302-vert]

My car drones a LOT less without the cats... When i put them back on for emissions I feel the cut in power (they are high flow as well) and it drones like a mother...

O/R pipe all the way....

 

[Pokageek]

I heard the x pipe does not drone as much.

 

[greenstang1313]

i'd gaurantee you at least 15rwhp, maybe 20rwhp if you went no cats.

 

[JJ95GTID]

I heard the x pipe does not drone as much.

Nope, no drone here. Going from high flow cats to O/R is only worth about 10hp on a naturally aspirated car. Maybe more on a forced induction car.

 

[Pokageek]

Maybe I will go X then. Anyone know if the 87-93 will fit the 94/95? Any different for a vert? I forget..

 

[greenstang1313]

i think the hangers are in different places. Anything is possible though.

 

[JJ95GTID]

My x-pipe doesn't use hangers because it is much lighter than the stocker.