SpecNaz Posted February 4, 2017 Share Posted February 4, 2017 Hey guys, I recently got an 06 5EAT LGT with a 100k in pretty good condition. I want to just go to stage 2 and call it a day &I for simplicity's sake just stick with one brand (COBB) in this case. AP, intake, DP & lastly UP. The only thing is, the Cobb UP is one single piece &I I've read a lot about that it leaks where as the GRimmspeed UP has the flex section to prevent leaking. I cant find definitive posts about which is truly better. Any help would be appreciated! Thanks! Link to comment Share on other sites More sharing options...
coldsoda Posted February 4, 2017 Share Posted February 4, 2017 I own the GS up pipe and couldn't be happier with the quality. I've had turboXS up pipes in the past and the GS is a notch up in quality IMO. Leaks are usually poor installation, cheap/bad part, or bad gaskets. I use OEM gaskets or the supplied GS gaskets and never had a problem and thats over many thousand hard miles on multiple turbo subarus I've owned. Cobb makes some really high quality stuff, I don't think you'll go wrong whichever option you choose, but if they were the same money - I'd take the GS pipe. Link to comment Share on other sites More sharing options...
Mike07LGT Posted February 5, 2017 Share Posted February 5, 2017 Also you dont need an intake. Save the money your car will run much better with the stock airbox and a good tune. Buy a nicer downpipe/uppipe and get a good tune and you will be happy 03 WRB WRX (RIP) 04 JBP STI (sold) 07 DGM Legacy GT (RIP) 12 OBP STI (DD) Link to comment Share on other sites More sharing options...
SpecNaz Posted February 5, 2017 Author Share Posted February 5, 2017 Awesome, thanks for the feedback. They are roughly the same price, so guess now I'll just have pick on which looks nicest lol. Strange considering no one will ever see it unde the hood Link to comment Share on other sites More sharing options...
I Donated Too sigmafour Posted February 5, 2017 I Donated Too Share Posted February 5, 2017 The GS up pipe is probably the best buy right now. I used the Perrin up in the past when the GS flex had a dodgy reputation but they addressed that and my Perrin cracked as it was a one piece. Without hesitation I would say get the GS one. Also, another vote for keep the stock airbox - shove an AEM dry filter in it and it's good for well past Stage 2, it's a very well designed part. Link to comment Share on other sites More sharing options...
MilesA Posted February 5, 2017 Share Posted February 5, 2017 A lot of exhaust leaks are caused by using the wrong gaskets, tightening things down in the wrong order, or not using the correct torque. Use the multi-layer steel gaskets with the raised boss that locates the gasket on the pipe. Either the genuine OEM gaskets which can be bought at a discount online or the GS double thickness gaskets have been shown to work well. A flex section on the uppipe is desirable because metal expands when hot and if it is secured at both ends, there needs to be some way to relieve the strain. The catless OEM uppipe does have a flex section but it is hidden under the heatshields. Link to comment Share on other sites More sharing options...
SpecNaz Posted February 5, 2017 Author Share Posted February 5, 2017 GS it is then! Thanks guys for the insight, Looks like GS doesn't make a DP for an AT so I'll have to use the UP with a Cobb DP Link to comment Share on other sites More sharing options...
relative4 Posted February 6, 2017 Share Posted February 6, 2017 OEM downpipes are specific to transmission type, but aftermarket downpipes such as Grimmspeed and Cobb do not have transmission attachment brackets. So your transmission in no way affects your choice of downpipe. Link to comment Share on other sites More sharing options...
The 2Fiver Posted February 6, 2017 Share Posted February 6, 2017 OEM downpipes are specific to transmission type, but aftermarket downpipes such as Grimmspeed and Cobb do not have transmission attachment brackets. So your transmission in no way affects your choice of downpipe. MT downpipes won't fit on the AT cars. The final bend before the catback connection is different. You will definitely have to buy an AT friendly downpipe. If you're looking to call it a day, at least set it and forget with a custom tune on your accessport. Link to comment Share on other sites More sharing options...
pseank Posted February 8, 2017 Share Posted February 8, 2017 Definate on a custom tune. I know Cryotune did great for me and Tuning Alliance has an Awesome reputation as well. Do not skimp here it is critical that these guys be involved immediately unless of course you really want to upgrade your engine. I would never trust an off the shelf map for long especially because I run hard. Sent from my XT1254 using Tapatalk Link to comment Share on other sites More sharing options...
relative4 Posted February 8, 2017 Share Posted February 8, 2017 MT downpipes won't fit on the AT cars. The final bend before the catback connection is different. You will definitely have to buy an AT friendly downpipe. Wow, my bad. Somehow never picked up on that; never worked on (or driven) an AT Legacy. Sorry to hijack, but reviewing the fitment on the GrimmSpeed pipe, I noticed it specifies non-VF46 only. I'm assuming this is a wastegate flapper issue, correct? Given that, I think it's strange they would specify the pipe as a fit through '09, because as I understand it the VF46 is standard equipment for '07-'09? I guess they're targeting VF52 & other turbo buyers. Link to comment Share on other sites More sharing options...
The 2Fiver Posted February 8, 2017 Share Posted February 8, 2017 The 46 is 08/09 yep. The GS pipe is a goofy design so I wouldn't be surprised if there were fitment issues. Maybe it only works with the VF40? As for the downpipe, I remember reading somewhere that AT DP's can be fitted to MT cars. Link to comment Share on other sites More sharing options...
relative4 Posted February 8, 2017 Share Posted February 8, 2017 As for the downpipe, I remember reading somewhere that AT DP's can be fitted to MT cars. Correct. I've put OEM AT DPs in my MT cars. Link to comment Share on other sites More sharing options...
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