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View Full Version : another exhaust question... blah


jon_mr2
05-11-2008, 09:27 PM
okay, i know everyone who opens this thread is gona say OMG this is like the millionth and one exhaust question thread made. and/or use the ******* search feature. well, okay, ive tried searching and searching and ill list what ive found after i post this question.

oh yeah, this is for a 89 240sx with a 95 ka24de

Question:
What size of test pipe/resonator should i use to connect a OBX header (ID: 2.25") to an HKS hi power (ID:3")? Should i use a 2.5" pipe or 3"? i just dont really know if the flanges are the same and will bolt up correctly.

Ive found people saying they used 2.25" to 2.5" using the smaller gasket and/or people using 2.5" to 3", but ive never found if the flanges are all the same or what not. im assuming the 2.5" pipe would work, but would a 2.25" to a 3" work? i guess all im asking is if the flanges are all the same, that would probably answer all my questions. i feel really dumb asking this... just dont want to order the wrong part.

Jon

90KAcoupe
05-16-2008, 12:46 AM
all the flanges should be the same...

CoasTek240
05-16-2008, 01:03 AM
itll fit.

the flanges may be slightly different sizes... but itll still fit.
this is an issue i had thought about and dealt with in the past.

apex
05-16-2008, 02:27 AM
dont feel dumb just search its been coverd b4 :keke:

yea they are all the same size the only diff. is the opening
i got a sohc with 2.25 header,3" test pipe and 3" catback
b4 i had 2.25 header stock cat and 3' catback all fit

jon_mr2
05-16-2008, 03:30 AM
hey guys!

thanks for all your replys. guess ill be on my way to order the parts up!

Jon