Longtube headers

steve20 · Apr 30, 2005

I have a 98 gt with magnaflow magnapaks and I was thinking of getting bbk longtubes and not sure which midpipe. a bbk x or h? And how much would the headers and mid pipe change the sound? I really like the way the packs sound and dont want to change that sound too much.

thanks

mto gt2000 · Apr 30, 2005

Well, with with bbk longtubes and a h pipe it should be a louder tone but still deep. The x pipe will make it raspy in higher rpm.

stangman · Apr 30, 2005

prochamber, or dr. gas x-pipe. two best sounding mid pipes i've heard

steve20 · Apr 30, 2005

so say if i went with the bbk longtube headers and h pipe along with my packs about what kind of numbers would I be looking at?

stangman · Apr 30, 2005

you should be in the neighborhood of 20rwhp with going to lt's & a mid pipe. i gained 19rwhp with mac longtubes & a prochamber on a MUSTANG dyno. if i had been on a dynojet it would prolly been around 23-25 rwhp

stangman · Apr 30, 2005

stangman said:
you should be in the neighborhood of 20rwhp with going to lt's & a mid pipe. i gained 19rwhp with mac longtubes & a prochamber on a MUSTANG dyno. if i had been on a dynojet it would prolly been around 23-25 rwhp

sorry that's on my 03.........on my 98gt i gained 13 rwhp (mustang dyno also) if i remember correctly (dont' hold me to that, it's been a few years since i've had that car) same exhaust setup with mac longtubes & prochamber

steve20 · Apr 30, 2005

stangman said:
sorry that's on my 03.........on my 98gt i gained 13 rwhp (mustang dyno also) if i remember correctly (dont' hold me to that, it's been a few years since i've had that car) same exhaust setup with mac longtubes & prochamber

This may sound like a dumb question but why is the 98 hp lower then the 03. Does this have something to do with the 98 being npi?

stangman · Apr 30, 2005

steve20 said:
This may sound like a dumb question but why is the 98 hp lower then the 03. Does this have something to do with the 98 being npi?

never any dumb questions............. *remembers where he is*........ummmmmmm nevermind. but that's not a stupid question

that would be the exact reason, the 03 has better flowing heads which = better HP numbers

Steve777 · Apr 30, 2005

steve20 said:
This may sound like a dumb question but why is the 98 hp lower then the 03. Does this have something to do with the 98 being npi?

Yep, 96 - 98 GTs had non-PI intake manifolds and heads. Basically non-PI cars stop pulling after 4 grand , where as the 99+ keep on going strong

steve20 · Apr 30, 2005

Looks like I really should do the pi swap

stangman · Apr 30, 2005

steve20 said:
Looks like I really should do the pi swap

i'd highly recommend that & since the heads are out ya may as well put in the lt's

steve20 · Apr 30, 2005

What would be some good cams to put in if I do the pi swap, something better than the pi cams?

RedDaemon · Apr 30, 2005

stangman said:
prochamber, or dr. gas x-pipe. two best sounding mid pipes i've heard

prochamber x and bbk x (both catted) sound pretty much the same....just something to consider when/if u buy a midpipe

stangman · May 1, 2005

steve20 said:
What would be some good cams to put in if I do the pi swap, something better than the pi cams?

all depends on what you plans on the car are. after you figure out what you want to do with it in the future then we can recommend some good ones

Darkhorse845 · May 1, 2005

steve20 said:
Looks like I really should do the pi swap

I highly recommend you do if you can.Also do some Bassani
LT's if possible.

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