Exhaust issue - TriStateTuners.com :: Home of Tristate Auto Enthusiast

akley88 · 03-04-2014, 07:54 PM

i recently installed long tube headers on my pathfinder. so now my exhaust is long tube headers to y-pipe with no cats - to the biggest muffler magnaflow makes then a small magnaflow muffler at the tail pipe. piping from the header back is 2.5". the problem i have now is it sounds like there is an exhaust leak. i can hear a whooshing sound. i have replaced gaskets on the manifold and header flange. i have heard of some people saying you can hear the exhaust pulses in some headers. i thought maybe if i add high flow cats back into the y-pipe if that will help the sound.

so im looking for any suggestions.

jpalamar · 03-08-2014, 11:33 PM

Try running 1 muffler.

kiper · 11-19-2015, 09:10 PM

I would guess the whooshing sound is coming from the 2 muffler you installed. Another contributory is the pipping you use. What is the inner diameter size does it have?

03-04-2014, 07:54 PM	#1
akley88 Tri-State Aficionado Join Date: Dec 2010 Location: Reading, PA Member #18685 My Ride: 2014 Altima iTrader: (0)	Exhaust issue i recently installed long tube headers on my pathfinder. so now my exhaust is long tube headers to y-pipe with no cats - to the biggest muffler magnaflow makes then a small magnaflow muffler at the tail pipe. piping from the header back is 2.5". the problem i have now is it sounds like there is an exhaust leak. i can hear a whooshing sound. i have replaced gaskets on the manifold and header flange. i have heard of some people saying you can hear the exhaust pulses in some headers. i thought maybe if i add high flow cats back into the y-pipe if that will help the sound. so im looking for any suggestions.

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03-08-2014, 11:33 PM	#2
jpalamar TST Ruined My Life! Join Date: May 2009 Location: Collegeville, PA Member #13773 My Ride: 03 Corvette Z06 iTrader: (3)	Try running 1 muffler.

11-19-2015, 09:10 PM	#3
kiper Tri-State Training Wheels Join Date: Nov 2015 Member #27181 iTrader: (0)	I would guess the whooshing sound is coming from the 2 muffler you installed. Another contributory is the pipping you use. What is the inner diameter size does it have?