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High flow bridge coupler ?

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Old Feb 10, 2007 | 05:13 PM
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Default High flow bridge coupler ?

I just bought a high flow bridge, and it didn't come with a coupler to connect it to the throttle body. Anyone know what size I need, and where I can get one? Thanks.
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Old Feb 10, 2007 | 05:22 PM
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They may not all be the same size. Maybe, if you knew the manufacturer of the after market air bridge, someone would know from personal experience. You could measure the OD with calipers or a short piece of string. You might include an image for someone to try to identify.
Generally, the MAF on a C5/Z06 is 3.75" OD, but some say a 4" will work just fine...as to the air bridge side, I know that 4.50" is sometimes recommended...again, not knowing what you have.
So, you might need a reducing coupler 3.75"x4.50". You could do an internet search using those keywords and find suppliers, or inquire with some of the site vendors in the column to the left on the main menu.
As to where you can get one, I'll bet someone will offer theirs up or you can sometimes get lucky and find one in the CF classifieds or EBAY.
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Old Feb 10, 2007 | 05:30 PM
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I just measured the bridge, and its 4" on one side, and 3.75" on the other. Not sure which end goes to the maf, and which one goes to the throttle body. (My car is in the shop right now so I have nothing to compare to.) I believe the TB is 3.75" Anyone know what size the MAF is, 4"?
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Old Feb 10, 2007 | 05:34 PM
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Ohh, one more bit of info that would be helpful. My car is a 99, so the MAF isn't between the bridge and the TB. It's between the bridge and the filter.
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Old Feb 10, 2007 | 05:50 PM
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Ok, looks like a just need a 3.75" coupler, only problem is I can only find them in 3" sections. Anyone know where I can get one a little bit longer? I've already checked Ebay. Thanks.
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Old Feb 10, 2007 | 06:55 PM
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They usually come in 6" in length (whatever the oem accordion bellows is). It can be adjusted somewhat, but you shouldn't have to trim any off.
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Old Feb 10, 2007 | 07:26 PM
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Originally Posted by 99Lingenfelter
I just bought a high flow bridge, and it didn't come with a coupler to connect it to the throttle body. Anyone know what size I need, and where I can get one? Thanks.
Is it a brand name bridge? Most of the couplers are 3" long. A BPP Carbon Bridge takes a special length if you have one of those........
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Old Feb 10, 2007 | 07:36 PM
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Originally Posted by 99Lingenfelter
I just measured the bridge, and its 4" on one side, and 3.75" on the other. Not sure which end goes to the maf, and which one goes to the throttle body. (My car is in the shop right now so I have nothing to compare to.) I believe the TB is 3.75" Anyone know what size the MAF is, 4"?
Maf on a 99 should be 3 1/2" outside
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