OBX header collecter size? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Devens240 · 05-20-2008, 09:32 PM

is the collector on an OBX header 2.5" or 3"? ( the part that bolts up to your cat back)

***S14DB*** · 05-20-2008, 09:37 PM

2.5" ID, 4" flange.

Watch out for some of the no-names on ebay. They have a 2.5" ID but the Bolt holes are less than 3" apart. So if you use a 3" Test pipe on some of them you'll get a leak. Using a 2.5" gasket fixes the problem. Have not seen this problem on the OBX brand. Only on the no-name ones.

Devens240 · 05-20-2008, 09:44 PM

ok thankyou sounds good

05-20-2008, 09:32 PM	#1
Devens240 Zilvia Junkie Join Date: Dec 2007 Location: Washington Age: 34 Posts: 413 Trader Rating: (1) Feedback Score: 1 reviews	OBX header collecter size? is the collector on an OBX header 2.5" or 3"? ( the part that bolts up to your cat back)

05-20-2008, 09:37 PM	#2
*S14DB* AFC #1 Join Date: Oct 2003 Location: 昨晩あなたのお母さんの家 Posts: 20,181 Trader Rating: (3) Feedback Score: 3 reviews	2.5" ID, 4" flange. Watch out for some of the no-names on ebay. They have a 2.5" ID but the Bolt holes are less than 3" apart. So if you use a 3" Test pipe on some of them you'll get a leak. Using a 2.5" gasket fixes the problem. Have not seen this problem on the OBX brand. Only on the no-name ones. __________________ Comments should be taken as Opinions not as Statements of Fact

05-20-2008, 09:44 PM	#3
Devens240 Zilvia Junkie Join Date: Dec 2007 Location: Washington Age: 34 Posts: 413 Trader Rating: (1) Feedback Score: 1 reviews	ok thankyou sounds good