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Post by Vågen on Oct 1, 2014 10:02:55 GMT -5
Sorry if this has already come up.
stock exhaust is 1.5". Anyone rocking 1.75" or 2"? Pros/cons?
I doubt anyone has too much experience, but I got a quote for "the straight piping from the manifolds to the muffler, re-using the factory catalytic converter, and a full cat-back exhaust $450.00 installed." Seems good since the exhaust is shaking around and I'm looking for the ultimate grocery getter sans-turbo.
I'd like to keep the catalytic converter and pre-cat if I can, as I'm also looking to keep the wilderness that I drive this car into in existence. That might negate the diameter increase, no? If the cattys are shot, then I am certainly not replacing them, as I'm no longer inspected for emissions in Massachusetts.
My old 2002 WRX came with a 3" exhaust and gorgeous boxer purring/growling that I think back upon like an old ex-girlfriend who made my lower extremities shake. Gross. I'm not expecting that here, but I am hooked (and also married/broke now).
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Post by madmatt on Oct 26, 2014 22:33:09 GMT -5
coemgen
I run 1.75... have since I first built the car. Originally from the cat back with a glass pack, now, equal length header, 1.75, glasspack, cat. Works well.
I would think2" is starting to get towards the big side, but I think Dave (indkid87) is running 2" and happy, but not sure.
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Post by indkid87 on Oct 27, 2014 9:22:09 GMT -5
Yeah, I have 2" from my gutted cat all the way back, with just a short cherry bomb. I'm happy with it, but I never had truly stock exhaust on my car so I don't have much to compare it to.
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Post by Vågen on Oct 27, 2014 10:06:08 GMT -5
Good to know, thanks for sharing!
I've heard a bit about these Cherry Bombs, but have no idea what it is. Is this a motorcycle exhaust? Any manufacturer links?
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Post by indkid87 on Oct 27, 2014 12:27:44 GMT -5
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Post by Vågen on Oct 28, 2014 10:15:14 GMT -5
That does not sound very street legal. Fortunately in Massachusetts, I do not have to pass emissions, so if the catalytic converter is bad, I will just pull it. Otherwise, I'm still quite a bit of a treehugger. I wonder if the Cherry Bomb would set off any sirens...
Any idea which model number you were using?
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Post by indkid87 on Oct 28, 2014 10:52:03 GMT -5
Of course it's not street legal, but typically anything that isn't stock replacement isn't street legal. As long as you're not being an obnoxious asshat you shouldn't get pulled over for it.
I've been driving with nothing more substantial than a cherrybomb since I owned my Justy and I've never gotten pulled over or ticketed for it. It's not horribly loud, but I also have a removable silencer in the end of the pipe.
I used the shortest one I could find at the time. So I think it's 87048
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Post by Vågen on Oct 29, 2014 8:37:58 GMT -5
Cool. Forgive the noob question, as I'm new to exhaust (my last Subaru had the cat back done when I bought it) but I am wondering how DIY a cat-back could be.
I rent an apartment, so I don't have impact tools or welding equipment. Would I be able to unscrew the pipe from the converter or would I be cutting it? I'm trying to figure out if there is any way I can source the 2" pipe to a 90 degree elbow into the Cherry Bomb and then another elbow to the back of the car as well as the 3 hangers I will need. I would also need to figure out how to step up the hole from the converter to the new 2" pipe.
I'd love to do it myself but I am thinking the skill/tool level is beyond me. The guy I am working with wants $350 with a Flowmaster and I'd like to keep as much of that as I can in my pocket, especially after this wheel project is going over budget...
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Post by indkid87 on Oct 29, 2014 9:24:36 GMT -5
Exhaust work is kind of a pain, especially without a good selection of tools and a nice place to work. It's just a lot of fiddling around to get the right angles and ensure it all lines up correctly.
In order to run 2" from the cat back I had to make my own flange, not an easy easy task without an angle grinder and a drill press. Plus you'd need to clamp it all together if you don't have a welder.
I'm not saying it can't be done, but it'd be difficult. If you feel up for it, give it a try. I strongly encourage the diy route and the justy is a fantastic car to hone your skills on.
Just my opinion, good luck on whatever route you choose.
-Dave
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Post by Vågen on Oct 29, 2014 9:40:31 GMT -5
Ah those are 2 tools that would have to go on a shelf in a closet. The wife will not be a fan of that until I give her an entire garage. So, to the shop it goes!
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Post by Vågen on Oct 30, 2014 22:44:12 GMT -5
Of course it's not street legal, but typically anything that isn't stock replacement isn't street legal. As long as you're not being an obnoxious asshat you shouldn't get pulled over for it. I've been driving with nothing more substantial than a cherrybomb since I owned my Justy and I've never gotten pulled over or ticketed for it. It's not horribly loud, but I also have a removable silencer in the end of the pipe. I used the shortest one I could find at the time. So I think it's 87048 87048 has slanted inlet and outlet. 87507 is a tad longer and straight. Do you think you could take a look under your rear next time you are by the car? I'm wondering if the slant would pose a challenge to my exhaust guy, or if that would actually help with the 2 90 degree bends.
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Post by indkid87 on Nov 4, 2014 21:58:16 GMT -5
It was definitely a straight one.
Looking at my car won't help you much, mine side exits about halfway down the rear passenger door.
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Post by Vågen on Nov 6, 2014 13:05:01 GMT -5
Forgive my naivete, but why does the exhaust need to make 2 90 degree turns to go from the passenger side to the driver? If I went straight back from the catalytic converter, would it decrease my ground clearance?
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Post by madmatt on Nov 6, 2014 14:06:03 GMT -5
It only makes that turn to fit a standard muffler back there...
My system has no bends after the header... straight back, glasspack before the rear subframe/axles, cat between the axles and the rear bumper. The cat is the final element, no pipe after it.
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Post by Vågen on Nov 6, 2014 16:40:39 GMT -5
It only makes that turn to fit a standard muffler back there... My system has no bends after the header... straight back, glasspack before the rear subframe/axles, cat between the axles and the rear bumper. The cat is the final element, no pipe after it. Can you take some pictures next you get the chance? I'm leaving the cat alone, but I want to see how you squeeze your muffler in.
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Post by madmatt on Nov 7, 2014 13:35:12 GMT -5
pardon the mess... Prepping for Tall Pines, new rear bushings, welding stuff... general mayhem. I'm sure you could fit a short real muffler in where I have the glasspack (red thing). Some people say glasspacks on Justies aren't that loud. Mine is crazy loud, but there is a lot more compression, equal length header... yadda yadda. YMMV
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Post by Vågen on Nov 11, 2014 10:38:33 GMT -5
Wow, that looks great! Guess what I just bought for $8.68? Attachments:
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Post by Vågen on Apr 24, 2015 11:45:54 GMT -5
So I had the Cherry Bomb and stainless exhaust put in this morning. I definitely notice more smoothness throughout the whole power curve (haven't been on I93 yet). Ironically it is FAARRR quieter than the stock, with loose hangers and a big hole in the muffler.
I am really excited at how my car is coming out. The 15"s and the catback are really fun. I should get my vacuum gauge installed on Monday.
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Post by Vågen on Apr 24, 2015 13:52:46 GMT -5
coemgen I run 1.75... have since I first built the car. Originally from the cat back with a glass pack, now, equal length header, 1.75, glasspack, cat. Works well. I would think2" is starting to get towards the big side, but I think Dave (indkid87) is running 2" and happy, but not sure. Matt, you manufactured the headers yourself? Do you have any pictures anywhere?
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Post by madmatt on Apr 24, 2015 23:41:04 GMT -5
yeah somewhere in the "orange justy" thread in the rally section. more later.
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