My Impressions on Mac Headers
Thread Starter
Joined: May 2005
Posts: 1,410
Likes: 11
From: Port St. Lucie, Fl
My Impressions on Mac Headers I recently Had Vinci Hi Performance in Orlando do the install.They did a great Job with the install.I had encountered a problem with the fitment, the driver side header was rubbing against the steering y joint under hard acceleration. So the next morning, I did some modifying and now there is no more rubbing. I probably will be installing some poly urth engine mount bushings later on.The car really woke up with the install of Mac headers and catted Y pipe.Seems Like so many people down grade these headers, they go well with Loud mouth exhaust.I am really pleased with the set up. I cant wait until I get my Cam set up soon.Thanks again Joe,Roger,Craig, Will be seeing you soon again.
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Joined: May 2004
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From: Tree-Hugging, Bug eating CALI'
I had MACs on my car, and the sound changed a lot, especially after I added an O/R y-pipe. I didn' t really gain too much, but, I am sure that is mostly due to the poopy tune I had for them, at the time. They have good clearance, and have good plug access. They were a bitch to install on my car though. My QTPs were WAY easier to install. But, they are nice 
No one really down grades them on here. I have seen tons of threads saying how they flow just as good as long tubes with porting the primaries and such. The only thing that holds me back is the rubbing against the steering column that everyone gets. I need something that fits without modifying the vehicle. The headers are suppose to be made for the car, not the other way around. This is why I am going with pacesetter headers once again.
Originally Posted by hunterdawgs
What type of Bassani exhaust do you have and how do you like it?
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yes they move the cats to a completely different place.
http://www.stealthram.com/bassaniheadersinstall.html
here's plenty of pics showing where the new cats get moved to. on 98-99 models, the passenger cat doesn't get moved. the driver's side does. for 00-02 they both get put into different places.
http://www.stealthram.com/bassaniheadersinstall.html
here's plenty of pics showing where the new cats get moved to. on 98-99 models, the passenger cat doesn't get moved. the driver's side does. for 00-02 they both get put into different places.
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Originally Posted by corvet786c
I recently Had Vinci Hi Performance in Orlando do the install.They did a great Job with the install.I had encountered a problem with the fitment, the driver side header was rubbing against the steering y joint under hard acceleration. So the next morning, I did some modifying and now there is no more rubbing. I probably will be installing some poly urth engine mount bushings later on.The car really woke up with the install of Mac headers and catted Y pipe.Seems Like so many people down grade these headers, they go well with Loud mouth exhaust.I am really pleased with the set up. I cant wait until I get my Cam set up soon.Thanks again Joe,Roger,Craig, Will be seeing you soon again.
Originally Posted by Redneck Z
Thanks!..........bummer. 
Yeah, i've got them on my 98' and they are nothing to write home about. They are a quality made header, they just don't perform like a mid or longtube. I just wish there were more options for us poor people in the strictly CARB controlled state of California. 
Thread Starter
Joined: May 2005
Posts: 1,410
Likes: 11
From: Port St. Lucie, Fl
Yea I Had to Modify the steering Y Joint some, now no rubbing I think I took off about 1/16 of an inch is all that was needed. I am pleased with the set up.Great sound with LoudMouth Exhaust.Believe I have recieved about 25rwhp with computer tuning.The Guys at Vinci Hi Performance Know there stuff about LS1/LS6 Fbody and Corvette Specialists.