3sc0rt Member 50 Member For: 11y 6m Gender: Male Location: Newcastle Posted 23/10/12 08:47 AM Share Posted 23/10/12 08:47 AM Hi guys,I'm new to this forum and if there is anyone to answer my question they have got to be on here..I've got a BA XR6T which is currently running a standard exhaust with a high flow cat and I want to get a new system. Currently the car is making 300rwkw at 12psi and 361rwkw at 19psi. My goal is to eventually take it over the 400rwkw and my next mod is the exhaust. I have read multiple posts on here and other sites as well as nizpro, capa & smd. I think I am leaning towards the 4" by nizpro but when I told my local exhaust guy he told me its going to be hard to fit 4" under a sedan.. if it were a ute no problems... but a sedan its going to be to tight and may rattle and rub against the body. Can someone please tell me if they have a 4" under a sedan and if there is any problems, or any modification at all to fit. I'm totally up for suggestions and recommendations aswell. Thanks in advance!CheersRhys Link to comment Share on other sites More sharing options...
Henz Tampon inserted, Auto Acquired, next purchase a new handbag Donating Members 9,946 Member For: 16y 1m 3d Gender: Male Location: Vic Posted 23/10/12 08:54 AM Share Posted 23/10/12 08:54 AM The Nizpro one fits but is apparently a nightmare to get on and right. Manta make a twin 3" catback. But a single 3 1/2 will do the job too. 1 Link to comment Share on other sites More sharing options...
Bigkeels Throbbing Member Donating Members 594 Member For: 15y 2m 18d Gender: Male Location: Victoria Posted 23/10/12 09:10 AM Share Posted 23/10/12 09:10 AM Ive got a 4'' nizpro on mine, fits like a glove. Yeah its close in some spots but ive never had it touch the chassis or the body. all depends on who fits it, if you take your time and make sure its perfect in all spots you'll be sweet. From side on you can hardly even see the exhaust hanging down Link to comment Share on other sites More sharing options...
possum Donating Members 553 Member For: 14y 11m Gender: Male Posted 23/10/12 09:16 AM Share Posted 23/10/12 09:16 AM Every Nizpro 4" exhaust is trial fitted to a vehicle prior to shipment to ensure correct fitment :-)Its not a simple case of pipe diameter, the muffler designs play a huge part in how well an exhaust performs 1 Link to comment Share on other sites More sharing options...
3sc0rt Member 50 Member For: 11y 6m Gender: Male Location: Newcastle Posted 23/10/12 09:18 AM Author Share Posted 23/10/12 09:18 AM Will there be a big power gain from a 4" dump and 3.5" system to a complete 4" system? Bare in mind 400rwkw will be where I stop. My better half with kill me if I spend loads of money on this car as well as my Turbo 1980 MKII Escort lol. Link to comment Share on other sites More sharing options...
Kroozin Menace Donating Members 1,990 Member For: 13y 2d Gender: Male Location: Sydney Posted 23/10/12 09:49 AM Share Posted 23/10/12 09:49 AM go the 4" mate... wish I did though im currently running 2x2.5s mandrel bent.if you live in Sydney go to Windsor Exhaust in Richmond and tell him you want a good job.. that's exactly what you'll get and his pricing is fair too. 1 Link to comment Share on other sites More sharing options...
Riff Bronze Donating Members 670 Member For: 12y 7m 17d Gender: Male Location: Melbourne Posted 23/10/12 09:52 AM Share Posted 23/10/12 09:52 AM Yeah my Nizpro 4 inch fits Awsome doesn't hit anywhere on the car. Link to comment Share on other sites More sharing options...
Kroozin Menace Donating Members 1,990 Member For: 13y 2d Gender: Male Location: Sydney Posted 23/10/12 09:57 AM Share Posted 23/10/12 09:57 AM yeh only have 1 straight through perf. muffler in the rear but its pretty loud... sounds tuff though Link to comment Share on other sites More sharing options...
Mr_4.0 Member 1,096 Member For: 13y 3m 4d Posted 23/10/12 10:42 AM Share Posted 23/10/12 10:42 AM I'd love to see back to back runs between a twin 2.5 and single 3.5 on a stock turbo at around 16-17psi. I don't believe there were be much different at that power level. I could be very wrong. Link to comment Share on other sites More sharing options...
BRK Member 361 Member For: 12y 4m 10d Gender: Male Location: Perth Posted 23/10/12 12:07 PM Share Posted 23/10/12 12:07 PM The twin versus single debate - always a good one - but it is the mufflers that will determine this. I tested the rear manta twin 63 muffler as best as I could. The equipment was not too charming but the back pressure is very low ( below 2 psi) up to 12 PSI through the turbo for 360 HP at the wheels. I could not set up the test gear on the middle muffler. As a throw away...... I'd reckon a single 90 and a twin 63 would make close to the same power IF they both measure the same noise attenuation at the rear. I wish I could prove it - but cannot. Link to comment Share on other sites More sharing options...
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