guys who have modified the collectors on macs
08-22-2003, 09:52 AM
#1
guys who have modified the collectors on macs what exactly did you do, ive heard of people modifying the collectors to accept a 3" ypipe and then using a flowmaster y collector at the end
what exactly to you do to the collector of the headers for the 3" ypipe
pics?
dynos?
thanks
ryan
what exactly to you do to the collector of the headers for the 3" ypipe
pics?
dynos?
thanks
ryan
08-22-2003, 11:30 AM
#2
Re: guys who have modified the collectors on macs i just had mine modified. i had scavenger collectors welded on to the end of the macs using 2.25" j bends from jegs to fit the body. this made the header similar to a try-y long tube. it is designed for more low to mid range torque. the end of the merge collectors were 3.5" and i got reducer cones to go down to the 3" y-pipe. I didnt use the flowmaster y because the kid who made it made a proper merge at the end of my y-pipe so that it fits exactly inside of my 4" catback. the exhausts form each side of the y meet at the same time and flow into the catback together evenly. i would highly recomend modifying the macs and making a bigger y- pipe because i definetly noticed a difference.
08-22-2003, 11:31 AM
#3
Re: guys who have modified the collectors on macs Did mine...I think they turned out well, and worth the effort IMO.
Just cut the ball flanges off...use a short section of 3" pipe welded to the collector...weld the 3 bolt 3" collector flange to the extension and Voila...poor man's LT.
Do the same w/your ORP's/cats, and also the front side of Y-pipe. You now have a quick disconnect setup that you can swap out cats to ORP's in minutes, as well as eliminating 90% of the "MAC rasp". Sounds better(deeper/throatier)also. Not sure of any gains as post dyno was done after that and other mods.
Good luck......
Just cut the ball flanges off...use a short section of 3" pipe welded to the collector...weld the 3 bolt 3" collector flange to the extension and Voila...poor man's LT.
Do the same w/your ORP's/cats, and also the front side of Y-pipe. You now have a quick disconnect setup that you can swap out cats to ORP's in minutes, as well as eliminating 90% of the "MAC rasp". Sounds better(deeper/throatier)also. Not sure of any gains as post dyno was done after that and other mods.
Good luck......
08-24-2003, 12:09 AM
#7
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Re: guys who have modified the collectors on macs I had this done at my friends midas we cut off the ball flange and welded up a full 3 inch oryp. Even when i still had my borla it got rid of most of my rasp. I took a bunch of pics but then i stayed and had a few 
and needless to say i forgot my camera and have not had a chance to go back and get it. Once i get the pics i'll post them for ya. Sorry but i don't have any dyno runs after but once i do that i'll post it as well Do it you'll be happy. We also made our own 3 inch merge collector also. Later
and needless to say i forgot my camera and have not had a chance to go back and get it. Once i get the pics i'll post them for ya. Sorry but i don't have any dyno runs after but once i do that i'll post it as well Do it you'll be happy. We also made our own 3 inch merge collector also. Later