Once I have completed my 2 hole mod I will be working my way down to the exhaust system, now this one took me awhile, so many people saying different things from a 2.5" system is too big and saying a 2 1/4" system just doesn't give you enough flow, to an exhaust is a waste of time. Well after hours and hours I think I have come across a system which i think will work, I actually found it on this site as i did with the 2 hole mod. this exhaust system will go like this. oh and thank you for Kung-Foo-Kamel for posting the exhaust system. I have also been told that these alloytec engines like there back pressure, so should I just keep the headers/extractors stock and just go from the cats and back, also I am really only interested in power and performance not so much sound, is this the best system for me?
175KW Ute, 2 x HM Headers with 2.5" Collectors, 2 x FINN-EX 2.5" High Flow Euro Cats, 4 x 4 Wire O2 Sensors, 2 x Free Flow Manta Mufflers, 1 x Twin 2.5" Manta Rear Free Flow Muffler, Sounds Awsome, very V8 ish, probable better than most Gen3's with cat backs, produces fantastic torque, absolutly pisses on the SV6, had a XR6 Turbo worried for the first 3 gears , just need a better diff now
Somthing to look out for, if you vehicle has 4 O2 Sensors, which is most 06 Euro compliant VZ's, you will probably get issues if you put extractors and aftermarket cats on as the ECU monitors the flow via the O2 Sensors and will log fault codes due to to much flow, mine has been logging faults on both left and right banks, fuel econamy is still good so theres no bad to come of it apart from the "Check Power train" message that gives you the ****s