Z/Coupe/Sedan exhaust compatibility?
07-20-2017, 01:34 PM
#1
Registered User
Thread Starter
Z/Coupe/Sedan exhaust compatibility?
I want to get an exhaust for my G sedan with true dual (i.e. no crossover) 2.5" or even 3" piping, but I don't want to spend too much. Top Speed has some exhausts for the Z that fit the bill, but I'm not sure they will fit.
Now I know the exhausts for the cars are all different, due to the fact that the cars are different lengths. But there are kits to convert exhausts for the Z to the coupe, and exhausts that are sold with compatibility for the coupe and sedan. Therefore, by the law of transivity, exhausts for the Z *should* be easily modifiable to fit the sedan.
The main hangup I see isn't the length- it looks like the tips are different widths between the coupe and sedan. And the sedan has some kind of belly pan where the coupe's stock muffler is. Is that removable?
Now I know the exhausts for the cars are all different, due to the fact that the cars are different lengths. But there are kits to convert exhausts for the Z to the coupe, and exhausts that are sold with compatibility for the coupe and sedan. Therefore, by the law of transivity, exhausts for the Z *should* be easily modifiable to fit the sedan.
The main hangup I see isn't the length- it looks like the tips are different widths between the coupe and sedan. And the sedan has some kind of belly pan where the coupe's stock muffler is. Is that removable?
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dbeachy1 (07-29-2017)
07-20-2017, 09:15 PM
#4
07-26-2017, 12:06 PM
#6
If you're just trying to convert your stock system to a true dual exhaust system, you can do what I just did. I bought a used Nismo 370z H-Pipe for $50, they sell for around $200 on eBay but any after market H-pipe or X-pipe for the G37 sedan or coupe will work. Then have the mid pipe modified to match. The install and pipe work costed me $150. See below link.
https://www.myg37.com/forums/g37-sed...ml#post4147786
https://www.myg37.com/forums/g37-sed...ml#post4147786
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07-26-2017, 01:16 PM
#8
No drone at all, it's actually quieter in some situations and louder in others. With the stock setup, under normal to a little over normal acceleration in 3rd gear as the engine got closer to 2700rpm, I use to get a slight droning sound coming from the center of the car. With the H-pipe, it's almost completely gone. But now, under WOT, you can definitely hear the exhaust note change as you get closer to 4000rpm and it's louder but it's more from the back then from the center of the car. At freeway cruising speed (around 70 to 75mph), it's also a tad quieter. So I'm actually happy with it as it's only louder when you get on it and quieter when you're driving normal.
As a side note, my car is a California car with 54k miles on it, there wasn't any leaks or rust on the stock exhaust system. I think that droning noise I heard before is really the stock Y-pipe and where it converges the two pipes from the CATs as it goes to a 3" collector but with how it combines the pipes it makes them smaller than 1.5" as it goes to the flange. So doing this conversion definitely removes that restriction.
As a side note, my car is a California car with 54k miles on it, there wasn't any leaks or rust on the stock exhaust system. I think that droning noise I heard before is really the stock Y-pipe and where it converges the two pipes from the CATs as it goes to a 3" collector but with how it combines the pipes it makes them smaller than 1.5" as it goes to the flange. So doing this conversion definitely removes that restriction.
