Anyone make a 2.5" to 3" test pipe? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

*MELLO*SOS* · 10-16-2007, 01:41 AM

s13/KA, dumb question, I'm tired of searching.... Does anyone make or sell a 2.5" inlet, [preferably resonated], 3" outlet test pipe for the s13? Looked everywhere and can't find shit. I have a junk 2.5" outlet header on my KA, mated to a 3" resonated test pipe and a 3" exhaust... Needless to say I've got a nasty exhaust leak between the header and the test pipe.... Rather than pull the header off & chop the flange, weld a 3" to 2.5" reducer & a 3" flange, I figured it would be easier to do the 2.5"->3" expansion in the test pipe.

I priced it out, to build my own 2.5 to 3" test pipe.. But for two gaskets, a 2.5" SS flange, a 3" SS flange, a SS 3" to 2.5" reducer, a foot of 3" SS piping, plus shipping and a few bucks for my welder guy, it turns out to be a pretty expensive solution to my exhaust leak. Someone has got to make a relatively cheap 2.5" inlet 3" outlet test pipe?

Open to hearing other ideas... This is a somewhat temporary solution until my motor is finished and swapped with custom DP... I can't stand listening to it idle any more!!

Thanks

Edit: I have a 2.5 in/out carsound high flow cat I can play with.. Thought about chopping both flanges to shorten it, then welding in the reducer and a 3" flange at the inlet and rewelding the 2.5" flange as close to the cat as possible... This will make it at least an inch or two longer, will that screw up the catback fitment or what? I don't mind running a cat on the KA, but I'd prefer the test pipe if possible.

10-16-2007, 01:41 AM	#1
MELLOSOS* LAID OUT Join Date: Mar 2004 Location: LAS VEGAS Age: 43 Posts: 2,015 Trader Rating: (1) Rides Gallery: MELLO*SOS Feedback Score: 1 reviews	Anyone make a 2.5" to 3" test pipe? s13/KA, dumb question, I'm tired of searching.... Does anyone make or sell a 2.5" inlet, [preferably resonated], 3" outlet test pipe for the s13? Looked everywhere and can't find shit. I have a junk 2.5" outlet header on my KA, mated to a 3" resonated test pipe and a 3" exhaust... Needless to say I've got a nasty exhaust leak between the header and the test pipe.... Rather than pull the header off & chop the flange, weld a 3" to 2.5" reducer & a 3" flange, I figured it would be easier to do the 2.5"->3" expansion in the test pipe. I priced it out, to build my own 2.5 to 3" test pipe.. But for two gaskets, a 2.5" SS flange, a 3" SS flange, a SS 3" to 2.5" reducer, a foot of 3" SS piping, plus shipping and a few bucks for my welder guy, it turns out to be a pretty expensive solution to my exhaust leak. Someone has got to make a relatively cheap 2.5" inlet 3" outlet test pipe? Open to hearing other ideas... This is a somewhat temporary solution until my motor is finished and swapped with custom DP... I can't stand listening to it idle any more!! Thanks Edit: I have a 2.5 in/out carsound high flow cat I can play with.. Thought about chopping both flanges to shorten it, then welding in the reducer and a 3" flange at the inlet and rewelding the 2.5" flange as close to the cat as possible... This will make it at least an inch or two longer, will that screw up the catback fitment or what? I don't mind running a cat on the KA, but I'd prefer the test pipe if possible.