I will be ordering A set when I get back from vacation, and wandering how good they are, and how much RWHP I can epect to gain from them with my mods?

<img src="graemlins/gr_guns.gif" border="0" alt="[guns]" /> <img src="graemlins/camaro.gif" border="0" alt="[Chevrolet]" />

 

Anyone?

 

Im not much of a dyno ***** so I couldnt tell you horsepower, but I know I picked up almost 3 tenths with the MACS and ypipe with cats.

 

I think 15 to 20 rwhp is pretty typical.

If you mod the MAC's and run ORP instead of cats you might bet 25rwhp or so

However if tuning issues occur like running rich you might not really get anything until the car is tuned.

 

I was using the MACs w/ off-road a year ago and really liked them. You can't beat them for the money. Here is what I gained w/ the MACs. I also had the flowmaster 3" collector mod done and ported the primaries.

(copy and paste link into address bar to view)
www.geocities.com/jason99ta1/header_dyno.jpg

[ December 29, 2001: Message edited by: Jason99T/A ]</p>

 

I had MAC's on my car for a looong time before I switched to the Dynatech's. On a mild setup, they seem like the hot ticket, especially for the money. My headers fit well, but the y-pipe (off-road) did leave a little to be desired.

I eventually ended up cutting off the MAC ball-flange collector end to convert the collector to a true 3" opening, and just running 3" Moroso spiral-flow mufflers/dumps...