Header & Exhaust group buy

4675 Views 35 Replies 10 Participants Last post by leadfoot_mf, May 13, 2008

mille162

Discussion Starter · Jul 17, 2007

My car has been at Fabspeed (www.fabspeed.com) being used as a template for a new exhaust system. They already manufactor a Tubi like system that replaces the rear mufflers and increases the growl. If you look at the entire system though, you'll see there's a center resonator, infront of that a set of secondary cars (not required in the US for emissions since they are AFTER the second set of O2 sensors), and a bend in the pipe that pretty much flattens it out completely.

The new system sounds amazing and looks great. The clearances are no issue and it looks like the flattened out pipe is just the factorys way of being extremely conservative clearance wise.

Fabspeed also has a complete system from a warranty car from headers back that they've been experimenting with.

Car goes to the dyno tomorrow and after any needed tweaks, will go into production.

Rear mufflers w/SS tips: $1495

Center Resonator bypass kit (set-up still with an "x-pipe" design): $1000

Secondary CAT bypass pipes, $1890

All pieces are polished SS and drop in fitments, none of the above void warranty

All three can be used individually to tune the sound to your liking or order all three togeter and get a $300 discount or free local installation in the Philadelphia area.

If there are 5 or more people interested, there are 2 options for new headers as well (count me as #1 in line). This might or might not affect the warranty depending on your dealer and the problem since you're replacing the CAT. Car is still emissions legal and guaranteed no check engine light issues

opt 1. Take existing system, replace 600 cell count CAT with 200 cell count CAT and clean up some of the welds and bends (there's a 90 deg. bend in there!). $2000

opt 2. Complete new header with F1 style collector and 200 cell count CAT. $4000.

I will post pictures in a few days but while they have the car, wanted to see how many might be interested in headers, so if you are (or any of the other pieces), please PM me and I'll start a list for the group buy. 5 or more people upfront they'll knock 15% off the headers. 10 or more people and they'll knock 20% off

-Ron

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The Head

· #2 · Jul 18, 2007

4k would be more then ordering the Euro headers and a set of cat bypasses from the guys in germany...and I doubt you would get more flow

but with the discount that would be pretty good...can they fab up some test pipes that run from header to resonator? my resonator and back boxes are already replaced but I need something up front any shots of the unit?

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The Head

· #10 · Jul 31, 2007

any photos of those cat bypass pipes installed?

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The Head

· #13 · Aug 7, 2007

pganmol said:
To see the dyno is the best. I do not think that we will gain a lot form changing from the flat pipe to the round pipe(bypass the cat is another story). I know that the Trofeo race car also use that flattened pipe. From the pic, you could see that the flat pipe is actually bigger than the other pipe section. So when it was flattened, the cross section area for the exhaust flow is roughly the same as the other pipe section. If I want to do anything, maybe just cut the main cats out and put pipe instead. This will cost a lot less.

while the crushed area may be larger it will still impede flow due to the shap change in the piping will also mess up exaust gas velocity and create an eddying around the edges as more gases than can exit through said space hit the walls around the narrowed opening....Mille if you want people to buy in to this stuff responding may be helpful

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