What bolts to use between 3" flat flange dp/catback
#1
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From: Santa Rosa
Car Info: 2002 WRB WRX
What bolts to use between 3" flat flange dp/catback
Do I use the spring bolts or do I have to go out and buy some different ones. I'm trying to mate a 3" helix dp to a 3" catback. If I need to buy new ones, what type do I know to get without physically taking one off my car and bringing it in to the store? Advice anyone?
TIA
oh and edit: Any advice right off the bat that I should know about or tools I might overlook doing this install?
TIA
oh and edit: Any advice right off the bat that I should know about or tools I might overlook doing this install?
Last edited by 4eatme; 08-03-2009 at 12:27 PM.
#2
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From: Sebastopol, CA
Car Info: '04 PSM Sti
The stock spring bolts aren't gonna work, just pick up a pair of 2 inch long 3/8'' dia hex bolts and some nuts, washers and lock washers for them. And you'll just need the right size wrenches for the new bolts you get, a 2-bolt 3'' gasket, and I'd get a new turbo to dp gasket as well. The stock spring bolt head is 14mm and the nut is a 12mm and the nuts at the turbo are 14mm also btw. Let me know if you have any other questions.
Good luck with it!
-Chris
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Good luck with it!
-Chris
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Last edited by crfsti; 04-24-2011 at 07:10 PM.
#6
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Car Info: 2002 WRB WRX
that heat shield was a PITA! I pulled off 7 bolts and it came off. Is there some hidden transmission bolt that won't let the dp off if I don't get to it right now or was that only for the forester DIY?
#7
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Car Info: '04 PSM Sti
^^yeah, there's one bolted into the trans that has to come out also, it's a 14mm. You'll see a flat metal tab coming off the dp bolting it to the trans.
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Last edited by crfsti; 04-24-2011 at 07:10 PM.
#8
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Car Info: 2002 WRB WRX
OK HOLY CRAP, don't ever try and do that with the wrong tools. In the end everything is mated and it sounds/performs great, but I think I need to tighten the turbo/dp bolts. I'm hearing a slight hiss around 2000rpm no other rpm though. Hope its not a leak.
#9
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From: Santa Cruz county, CA
Car Info: A stupid R32
Oh....and you should be able to see some carbon build up on the out side of the DP CB mating, that will tell you the leak is at that junction. And I am currently using the spring loaded bolts on my Titek to SPT catback, you have to compress the hell out of them, but they do work, even when you have a 1/4 flange on both sides.
Last edited by camshaft06; 08-03-2009 at 10:44 PM.
#10
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^very informative thanks.
Yes, I used all new gaskets, and at the moment I just used some random 14mm bolts and lock washers on the dp/catback flange. Surprisingly I didn't take off the IC lol that why it was a PITA.
It sounds, if anything, like the noise is coming from the turbo. I don't know if i'm hearing the turbo spool up more or a leak. It does have a faint 'sputter' type quality to it, so idk. I will recheck and retighted all bolts tomorrow morning as I drove around alot tonight.
But wow, world of difference powerwise, I love it. And it sounds mean. The hiflow cat and the silencer on the SRS keeps the noise level down but it does give off a super deep tone. I wouldn't say it is louder than what I had before (silenced SRS stock DP), but it is just deeper. We will see how the leo's like it :/
Yes, I used all new gaskets, and at the moment I just used some random 14mm bolts and lock washers on the dp/catback flange. Surprisingly I didn't take off the IC lol that why it was a PITA.
It sounds, if anything, like the noise is coming from the turbo. I don't know if i'm hearing the turbo spool up more or a leak. It does have a faint 'sputter' type quality to it, so idk. I will recheck and retighted all bolts tomorrow morning as I drove around alot tonight.
But wow, world of difference powerwise, I love it. And it sounds mean. The hiflow cat and the silencer on the SRS keeps the noise level down but it does give off a super deep tone. I wouldn't say it is louder than what I had before (silenced SRS stock DP), but it is just deeper. We will see how the leo's like it :/
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