ktktransam

iTrader: (1)

i bought a set of used mac mids and y pipe, simply because it was relatively cheap and couldnt pass them up.. i bought a new flowmaster y collector ( the mac one was bent) and ive heard about grinding down the welds at the top of the header (where they bolt to the head). my question is w/ the new collector and grinding down the welds, will that equal the power of pacesetters or even increase the mac's abilities??

also i drive a 98 A4 ws6 - ls6 intake, bbk 80mm tb, slp maf, slp lid, and the exhaust will be ran out of a cut out.. what kind of power increase can i expect to find with these and an asp underdrive pully.. my last #'s were 316/326

thanks,
dustin

dug

iTrader: (10)

At least 20rwhp and 15ft/lbs torque. They make power. Just look at them. Everything is a straight shot without any sharp bends. I think the 2.5" ypipe hurts them but then again people run 2.5" duals without any losses.

300bhp/ton

gases flow round bends perfectly fine. You can not simply look at it and say yes it flows well.

2.5" duals will flow double that of a 2.5" Y. There are 2 pipes with a dual and each pipe only has to contend with 4 cylinders, as opposed to 8 with the Y pipe.

300bhp/ton

in simple answer, yes if you are going from stock to mid manifolds you will see a gain. However there is no real said amount. Has your car even been tuned, because with all the other mods listed plus new headers it would benefit from a tune.

And no the mids ultimatley will not produce as much power as Pacesetters. This is beacause the Pacesetters are long tube headers and the primaries are longer. For a more technical explanation take a look at the sticky about exhaust and mods. There is some really good info about headers in there.

dug

iTrader: (10)

Id rather have pacesetters too but if you already got em might as well put them on.

Lane

iTrader: (1)

My stock internal car made more power/torque, and better track times with Mac's/duals than it did with Pacesetters/duals. Everything else about the setup was the same.