I know this has been discussed quite a bit and I have done a search BUT here it goes anyway.

I have a '93Z M6. I only have bolt ons right now and dont have firm plans to do the heads and cam yet. I have to do the exhaust anyway because when the cat was hollowed they put it on kind of slanted so it scrapes on everything. The car is lowered @ 1.5in so I need all the ground clearance I can get. I would like to stay emissions compliant so I will be putting a high flow cat on it as well.

I have heard a lot of good things about the MACs, I have also been looking at the AS&Ms too but dont know which ones to get. I just want teh biggest bang for the buck.

Thanks in advanced!

Matt

 

You can't go wrong with the MACs, they will still keep you emissions compliant and they will offer good ground clearance seeing that you are lowered.

 

I have also heard good things about the Jet-Hot long tubes. How bad would they kill my ground clearance? The MACs are looking like my best option right now. Will they have a noticable SOTP feel? What about in teh upper RPMs?

Thanks again!

Matt

 

Long tubes will be questionable on a lowered car. People do it, but they have most likely dragged parts of their exhaust on unruly road surfaces. The Jet-Hots should offer ground clearance to the Pacesetters. The headers should give you a SOTP feel, they did for me and I felt a noticable power increase all across the rpm range.

 

people have reported 30RWHP off of mac headers, so they have my vote
i believe they make pace-setters with emissions hookups too.
pacesetters offer great ground clearance

 

Yeah, the MACs are looking pretty good at the moment. Thanks for your replies.

Is there going to be a big or significant performance difference in the 1 5/8 vs. the 1 3/4 headers?

 

Doubtful, if you have a slightly modded car, you'll be pressed to see a big improvement.

 

I saw a program on Horsepower TV where they compared headers using an SBC on an engine dyno. The headers with large (1-7/8") primaries actually gave less power than the 1-3/4" ones on a mostly stock engine. The larger primaries were only a benefit on highly modded cars. Like 2000GTP said, it shouldn't make a much of a difference for you.

 

Pacesetters are inexpensive, have good clearance, are logically designed and easy to install and yes they have an emessions friendly version.

you are still going to scrape 'em though. If you live in a city that has crappy streets and bumps it is going to suck. Now if you live in a place that is mostly smooth roads or you are on the highway the majority of the time...then you're ok

 

i have heard a lot of good things about pacesetters and they offer real good ground clearence, stay away from slp

 

I like my Jet-Hots....no clearance issues at all.

 

i'm in the process of putting on my MAC mids...the install is a PITA, as anyone would tell you. can't wait to get it running tomorrow. so my vote is with MAC and good luck to you installing them haha

 

I have Jet Hots on my Z and I love them. My car isn`t lowered though. Pulls hard throughout the rpm band. I can e-mail a few pics if you want.

 

Jet-Hots/Pacesetters for LT's have good clearence.. Best choice for clearence though is the MAC's...

 

I've got to vote for the MAC headers. Great plug access, and ground clearance. My install wasn't that bad. Best of all, my full weight, stock bottom end, CC305, mildly ported head '93 Z went 12.0 with them...It also passed Marylands "treadmill" emissions.
They're going back on my new nitroused 355.

Frank