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mismatch flanges

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Old Apr 19, 2005 | 08:52 AM
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vortech305's Avatar
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mismatch flanges

Just got the Turbo headers(BBS) and the flanges are bigger than the turbo's. I believe they go by only Turbonetics specs. Do they make adapter flanges? If so would they be the best way to go? Any ideas or suggestions besides giving up, lol. This really sucks, cause i was looking foward to throwing it in along w/ the baer brakes.

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Old Apr 19, 2005 | 10:38 AM
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Your turbos have Garrett T3 flanges, and you manifolds have Garrett T4 flanges.

A quick search on google turned up this adapter (on the bottom of the page)...
http://www.turboengineering.com/misc...s/flanges.html
It's made to go the other way (T3 mani to T4 turbo), but I don't see why it wouldn't work for you.
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Old Apr 19, 2005 | 03:41 PM
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Wow thats really great, thank you. Do you think i can get away with it without any issues? Or would it be have to just get a T4 turbo w/ the same specs as the T60-1 turbo?
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Old Apr 19, 2005 | 03:55 PM
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Car: 82 Trans am
Engine: Twin turbo 350
Transmission: T-56
I'm not sure if the BBS kit comes with a downpipe, but if it does that adapter will throw everything off. My vote is to either get a T4 flanged turbine (you probably want something bigger if its a single anyway), or cut the flange off and weld the proper t3 flange on (assuming you are set up to do some welding).
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Old Apr 19, 2005 | 06:16 PM
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dosent come w/ a downpipe. I guess i can get away with it. If anyone else has any input feel free .

thanks guys.
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