12a And 13b Exhaust Flanges

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Sep 9, 2003 | 07:07 AM

72opelguy

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Joined: Sep 2003

Posts: 24

From: jax,fl

what is the difference between the 12a and the 13 b exhaust port/flanges i dont see much difference

Sep 9, 2003 | 08:04 AM

jspecracer7

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Joined: May 2002

Posts: 4,928

From: Okinawa, Japan

they're almost exactly the same. You can fit the 12A onto a 13B if you open the 12A holes a bit. HOWEVER the exhaust ports will be offset to the exhaust manifold.

Sep 9, 2003 | 12:28 PM

j9fd3s

Senior Member

Joined: May 2002

Posts: 22,465

From: California

Quote:

Originally Posted by 72opelguy' date='Sep 9 2003, 04:07 AM

what is the difference between the 12a and the 13 b exhaust port/flanges i dont see much difference

the 13b is 10mm longer in the rotor housings, so the exhaust ports are slightly further apart vs a 12a

mike

Sep 9, 2003 | 07:30 PM

72opelguy

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Junior Member

Joined: Sep 2003

Posts: 24

From: jax,fl

so do you think i could cut out the web between the ports on a 13b turbo header and push it together so it fits a 12a and weld it back up so i can have a turbo manifold for my 12a

Sep 9, 2003 | 09:13 PM

j9fd3s

Senior Member

Joined: May 2002

Posts: 22,465

From: California

Quote:

Originally Posted by 72opelguy' date='Sep 9 2003, 04:30 PM

so do you think i could cut out the web between the ports on a 13b turbo header and push it together so it fits a 12a and weld it back up so i can have a turbo manifold for my 12a

yep

Sep 9, 2003 | 09:43 PM

NUFFBOOST

Junior Member

Joined: Aug 2003

Posts: 5

From: South beach

Yeah it can be done, but why bother flanges are cheap buy one 19.00 - 43.00 and that depends on the thickness of the flange you want

Sep 10, 2003 | 08:08 AM

72opelguy

Thread Starter

Junior Member

Joined: Sep 2003

Posts: 24

From: jax,fl

well its is far simpler to use a turbo mamifold that has already been made than to make it all out of scratch i knoe i could make one but is a question of why should i if i can buy one