Originally Posted by DaveB

When the 2007 350Z came out with the VQ35HR motor and I saw pictures of the exhaust I took interest in the new Y-pipe. The layout of the y-pipe was entirely different than the Y-pipe that comes on the 2003-2006 G35s (VQ35DE/Revup). What really caught my attention was the longer down tubes and two rubber pucks mounted to the inside portions of the pipe. In exhaust theory, usually the longer the downtube off the header/manifold, the better the torque and powerband. I don't know if this was Nissan was going after, but obviously they saw some sort of performance benefit by substantially revising y-pipe. The rubber pucks were clearly installed to reduce NVH from the exhaust. After discussions with Godmans on this site, it turns out this revised Y-pipe fits because he's had it installed on his 1st gen G35 for a while now. I picked a HR y-pipe for $50 shipped and decided to give it a try for the hell of it. Tony with Motordyne has stated he thought the longer downtubes could improve low/midrange power because he's tested numerous Y-pipe downtube configurations when developing his new exhaust systems.

The DE y-pipe downtubes are about 5" long whereas the HR y-pipe downtubes are over 13" long. The exiting pipe at the midpipe junction is a full 2.5" vs the 2.35" for the DE y-pipe. Major power gains!!!!!!!!!1

Here's a shot comparing the two pipes:



I got the pipe installed tonight. There are no clearance issues and the pipe fits like the DE pipe. I drove around for about 5 miles and the car feels good. The car does feel better down low and in the midrange (nothing earth shattering), but I need to give it a week or so because my experience has been that it takes Nissan ECUs some time to adjust. One thing I did notice was reduced NVH under heavy load (low rpm going up hill and WOT). The exhaust tone is slightly deeper too and is slightly more exotic. Keep in mind I do have the 05/06 midpipe on my 03.

Originally Posted by ELMACHOGERACHO

Originally Posted by naughty240

Originally Posted by driguez

Originally Posted by Lucky-G

Originally Posted by vstypicals

Anyone know if I'll need 4 jack stands to do a Y-pipe plus test pipes install or will 2 jack stands be enough? I don't want to rely on the jack to lift up one side so essentially, I'm asking if both sides, front and back, need to be lifted or will lifting the front be enough?


Thanks!
Jeff

Originally Posted by tiguy99

Congrats bro! Not sure if you have a MD ISO spacer or not but toss that in the mix and you have a recipe for more fun fun fun. Have you reset your ECU yet?

Originally Posted by naughty240

I just raised the front. I also used a torch to loosen the bolts

Originally Posted by ELMACHOGERACHO

g35 sedan hr y-pipe fits with no problems. i just installed one on my car today. fits like a glove. hopefully i wont have to worry about the vibration issues since mine came without the vibration dampeners.