Anyone with top speed exhaust and 3" y pipe check this out
#1
Anyone with top speed exhaust and 3" y pipe check this out
I found this over on the subie guys' forums, an awesome 3" to 2.5" flange converter that's also available on Amazon:
3" Downpipe Adapter - Aftermarket DP>OEM Subaru Catback - GrimmSpeed
As a lot of you guys with the top speed exhaust and a 3" y pipe know, some of the rasp you get is from having the uneven piping diameter from the 3" y pipe to the 2.5" top speed y pipe. This can be pretty annoying considering the top speed on its own has no rasp and very little drone. And welding in a 3" to 2.5" exhaust reducer can be a hassle and possibly expensive at a shop as well, unless you can weld yourself. Something like this adapter that you can slide in between two flanges is so much easier.
If you buy this you're gonna need to cut off the 2.5" side of the pipe sticking out, but it only took me about an hour as an inexperienced dremel-er, haha. Mainly we're using the funnel on the 3" side. I installed this in an hour or two, and just tested it out this morning on my commute to school. There is still rasp and drone but I'd say its cut down by 1/3 to 1/2.. for a $40 part and a 2-3 hour DIY job that seems pretty awesome to me.
3" Downpipe Adapter - Aftermarket DP>OEM Subaru Catback - GrimmSpeed
As a lot of you guys with the top speed exhaust and a 3" y pipe know, some of the rasp you get is from having the uneven piping diameter from the 3" y pipe to the 2.5" top speed y pipe. This can be pretty annoying considering the top speed on its own has no rasp and very little drone. And welding in a 3" to 2.5" exhaust reducer can be a hassle and possibly expensive at a shop as well, unless you can weld yourself. Something like this adapter that you can slide in between two flanges is so much easier.
If you buy this you're gonna need to cut off the 2.5" side of the pipe sticking out, but it only took me about an hour as an inexperienced dremel-er, haha. Mainly we're using the funnel on the 3" side. I installed this in an hour or two, and just tested it out this morning on my commute to school. There is still rasp and drone but I'd say its cut down by 1/3 to 1/2.. for a $40 part and a 2-3 hour DIY job that seems pretty awesome to me.
The following users liked this post:
blnewt (09-20-2016)
#2
Registered Member
Is the rasp really bad because I'm about to buy fast intentions rhfcs, manzo 2.5in to 3in outlet y pipe and top speed y back exhaust and this is making me think twice on the y pipe
#3
It livable but not what you'd want if you just dropped 2-3K on an exhaust setup. Though the performance gains imo are worth it. If I had known in the future that I would be getting ART pipes and a 3" y pipe I probably would have gotten a 3" catback as well.
#4
Registered Member
Originally Posted by takeapieandrun
It livable but not what you'd want if you just dropped 2-3K on an exhaust setup. Though the performance gains imo are worth it. If I had known in the future that I would be getting ART pipes and a 3" y pipe I probably would have gotten a 3" catback as well.
#6
Movin On!
iTrader: (13)
Nice find! I ended up going back to my OEM Y-pipe since the rasp was pretty bad w/ my resonated test pipes going into a new 3" Ypipe then into my 2.5" TopSpeed. Now my rasp is completely gone. Not sure I want to introduce any rasp as I love the way the Resonated TPs sound w/ my Top Speed and OEM Y. If I could install this on the 3" Y that would be ok since I could go back to my OEM Y if I didn't get enough rasp reduction, at $40 it's worth a shot, and my OEM Y is SO shredded it would be nice to put that 3" one back on. Thanks a lot fro posting this up. Do you have any pics of the new connection?
#7
Registered Member
Originally Posted by blnewt
Nice find! I ended up going back to my OEM Y-pipe since the rasp was pretty bad w/ my resonated test pipes going into a new 3" Ypipe then into my 2.5" TopSpeed. Now my rasp is completely gone. Not sure I want to introduce any rasp as I love the way the Resonated TPs sound w/ my Top Speed and OEM Y. If I could install this on the 3" Y that would be ok since I could go back to my OEM Y if I didn't get enough rasp reduction, at $40 it's worth a shot, and my OEM Y is SO shredded it would be nice to put that 3" one back on. Thanks a lot fro posting this up. Do you have any pics of the new connection?
Trending Topics
#10
Registered User
iTrader: (3)
Killer find.. I have a Top Speed Y to the stock mid pipe and then Manzo mufflers. The rasp is pretty annoying.. A more expensive ($260) fix would be getting the Megan Mid pipe which is 3".. I think I'm going to swap in the OEM Y pipe again and see what the noticeable ratio is from power loss to rasp elimination. I'll make a before and after video like I always do on my YouTube channel with any mods.
#11
Sadly I did not take a picture of the connection where the adapter goes, but you can imagine fairly easily how it would look with that flange having a 1/2" additional flange adapter in between. Also, I have been hesitant to switch back to an OEM y pipe because I've heard how restrictive it is.. but at the same time the prospect of no rasp sounds amazing.
#14
Registered Member
Originally Posted by takeapieandrun
I might just do that then. I feel like test pipes are the main benefit in full exhaust anyways, and they shouldn't be affected by a different Y pipe.
Thread
Thread Starter
Forum
Replies
Last Post
supreme
Private Classifieds
3
10-13-2016 01:44 PM
mjnoles1
G37 Sedan
0
09-15-2016 11:02 AM