98SS Blackattack

Finally ready to put them on. Have been putting it off for months.
I have Stock Manifolds and cats now. How much power should i expect to pick up?

Demon Of Dreams

iTrader: (3)

25hp

98SS Blackattack

Seems a bit high...anyone else?

FHAWKer

At best 15-20rwhp if you have a non-restrictive cat-back. Of course if you have a blown and heavly cam'd motor, then you might get near the advertised gains...on a good day.

jlrz28

iTrader: (7)

15-25, just depends on what else you have done and what kind of cats your using and also your exhaust

b00sted

iTrader: (7)

Yeah somewhere around 20...Run a dynamouth with it or stock catback and a cutout...

98SS Blackattack

I have a Loudmouth Catback. Cats will be gone.

INMY01TA

iTrader: (1)

I got the Mac's and ORY, you'll notice it.

Redneck Z

iTrader: (3)

On a SI car, probably 12-15rwhp.

98SS Blackattack

Thanks guys. Im putting on the Mac's and an FMS F4 cam so i hope to see around 40-50 HP gain. The Cam is a .226/.594 lift

Drew's TA

I gained 25hp with MAC headers. with lid and loudmouth I had 300 even then after just the headers and catted y-pipe it jumped up to 325

Dip Stick

iTrader: (1)

Not sure what I had bone stock :0 but in my sig shows what I had with catted y-pipe and mac mids. The nly thing that seemed to change with the mac's is I lost some low end torque. I've done no chasis improvements, and the sexy twisting the car used to do during a hard 1-2 shift and on some 2-3 shifts was pretty much gone

The sound is insane Shrugs

Im getting a 228R installed soon, and optedn to go with pacesetter LT's..

Still using my borla catback, but Might go with a magnaflow.. to tame the sound down a little.

Benjamin Russick

iTrader: (1)

I'd say a good 20rwhp with the ORY. Make sure you clean up the welds and I'd lose the ball-flange and weld in a Hooker collector.

UMD_Jesse

iTrader: (6)

What kind of ground clearance do you get with MAC y?

jlrz28

iTrader: (7)

Ground clearance is great but it has been known to bang on the drivers side. This is similar to what I used on mine to fix all the problems http://www.thunderracing.com/catalog...id=528&pcid=54