Quad Exhaust Conversion ... Done!!

MrMason · 05-18-2011, 03:22 PM

Quote:

Originally Posted by idlook2

Looks fanastic! The fit and finish looks amazing. I was thinking about the weight difference of this and I would assume it would be pretty close to how it was before if not a few pounds lighter. The muffler is quite large and hefty. How do you like the sound?

The back box which came off was rather heavy. I never weighed it in comparison to the amount of stainless that has gone onto the car but I cant see it being that much different to be honest. Not for it to make any difference in road use.

The sound?? I LOVE IT.. Sounds so much better.. I think it now sounds how it looks

Incompatible · 05-18-2011, 04:33 PM

I'm wondering about heat build up in the enclosed area of the cross pipe. Unlike the exhaust routing on most vehicles which is generally exposed or well vented, the cross area is fairly well contained which I think could trap a lot of heat and create a problem over time. I wonder if the heat containment will eventually "cook" the bumper and damage the paint or other items in that area. With an M style bumper, I wouldn't think this to be a concern.

Have you had a chance to feel the bumper in the crossover area after a hard or extended run? Any noticeable temp difference?

Flying Scotsman · 05-18-2011, 04:48 PM

Conversion looks excellent and well done.

Exist · 11-10-2013, 03:42 PM

Going to bump this very old thread. Has anyone else done this?

Steeler · 11-11-2013, 04:00 PM

Not done it but here is a thread from the Z4forum on the subject

http://www.z4-forum.com/forum/viewto...f032cc#p851848

jdoublehcubed · 11-12-2013, 08:32 AM

Looks like there would be way more back pressure on the 3 cylinders piped to the the right vs those piped to the left. Curious about the long term impact on the engine of this.

StratusZ4 · 02-08-2021, 04:02 PM

How much was the exhaust itself?

pungo · 02-08-2021, 05:55 PM

Quote:

Originally Posted by StratusZ4

How much was the exhaust itself?

Holly old thread resurrection

05-18-2011, 04:33 PM	#24
Incompatible Major 55 Rep 1,224 Posts Drives: 07 AW Z4C 3.0Si Join Date: Aug 2007 Location: San Diego iTrader: (1)	I'm wondering about heat build up in the enclosed area of the cross pipe. Unlike the exhaust routing on most vehicles which is generally exposed or well vented, the cross area is fairly well contained which I think could trap a lot of heat and create a problem over time. I wonder if the heat containment will eventually "cook" the bumper and damage the paint or other items in that area. With an M style bumper, I wouldn't think this to be a concern. Have you had a chance to feel the bumper in the crossover area after a hard or extended run? Any noticeable temp difference? __________________ If you can't take the time to teach a kid something good, someone will take the time to teach them something bad.
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05-18-2011, 04:48 PM	#25
Flying Scotsman Private First Class 3 Rep 146 Posts Drives: BMW Z4 2.5L Join Date: Jan 2010 Location: Long Island N.Y. iTrader: (0)	Conversion looks excellent and well done.
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11-10-2013, 03:42 PM	#26
Exist Private First Class 11 Rep 192 Posts Drives: 2007 Z4 3.0si Coupe Join Date: Jun 2013 Location: Kentucky iTrader: (0)	Going to bump this very old thread. Has anyone else done this? __________________ -Spencer
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11-11-2013, 04:00 PM	#27
Steeler Colonel 2428 Rep 2,701 Posts Drives: Built not Bought 04 Z4 VF Join Date: Feb 2013 Location: Kitchener Ontario Canada iTrader: (2)	Not done it but here is a thread from the Z4forum on the subject http://www.z4-forum.com/forum/viewto...f032cc#p851848 __________________ W2A Intercooled Vortech V3Si, custom ducting, Alpha N, 60# Bosch,2.62 pulley, multi port WMI, Severn Tuning(pokeybritches), Tial, magnaflow,SS race muffler, 42 design,3.91LSD, H&R, Hotchkis,ST coils,Konis, Megan camber arms, AKG SS, Nylon mounts, Poly bushings, Carbon interior, CF Aero.APEX
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11-12-2013, 08:32 AM	#28
jdoublehcubed Mechanical Engineer 96 Rep 1,025 Posts Drives: 2006 Z4MR, Imola Red Join Date: Jul 2012 Location: Anaheim, CA iTrader: (1)	Looks like there would be way more back pressure on the 3 cylinders piped to the the right vs those piped to the left. Curious about the long term impact on the engine of this.
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02-08-2021, 04:02 PM	#29
StratusZ4 Registered 0 Rep 1 Posts Drives: 2007 BMW Z4 3.0si Join Date: Feb 2021 Location: Southern California iTrader: (0)	How much was the exhaust itself?
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