350Z HR Y-pipe installed on a 2003 G35
Well, still looking for a HR y-pipe and I've found a number of people selling the whole 350Z HR exhaust setup but...
I am curious if anyone knows if the muffler on the 07-08 HR 350Zs is the same as the one that is on the 06-07 (revup) 6mt G coupes?
I don't expect any performance increase but maybe a beefier exhaust note could be attained.
I am curious if anyone knows if the muffler on the 07-08 HR 350Zs is the same as the one that is on the 06-07 (revup) 6mt G coupes?
I don't expect any performance increase but maybe a beefier exhaust note could be attained.
Their exhausts went through some mild changes. As a result, the new HR Y pipe was born.
The 06-07 G 6MT coupe (revup) still had the 35VQDE motor= the older DE Y pipe was used.
Make sure you inspect the part you get before you plunk down the cash. By now you should know what part to look for.
Have the seller show you the exact pic of the exact part you're buying before you pony up the cash
Got my Y-pipe today. I was goin to install it today but one of the nuts was rounded off. Didn't have a socket that would grip. So I'll have to wait and get it to a muffler shop.
Joined: Mar 2009
Posts: 18,299
Likes: 1,488
From: By the sea, Tx
G35 sedan w/ too much money in mods
That's definitely a Z y-pipe. Longer flex tubes give it away. You'll enjoy the difference, but it's subtle. I made my growl a little more pronounced and throttle response is better.
Peace.....
Peace.....
So After some serious elbow grease, I got the OEM Y-Pipe off and installed the HR Y-Pipe.
I was skeptical at first, but you guys were right. Throttle response was noticeable instantly. My car is still stock. Driving on the freeway feels a lot better and responsive. Improved response when accelerating in 6th gear at freeway speeds (65-75 mph).
As for power increases, not noticeable.
I was skeptical at first, but you guys were right. Throttle response was noticeable instantly. My car is still stock. Driving on the freeway feels a lot better and responsive. Improved response when accelerating in 6th gear at freeway speeds (65-75 mph).
As for power increases, not noticeable.
awesome dude... it all about the tweak to the sound, and more so to responsiveness of your car... not so much a power gain, but making the most of what you already have!! 
been running mine since last September, along with the 06 Air Box, Z-tube, drop-in filter, MD spacer and 06 mid-pipe.. what a sweet state of bolt-on mods to bring out the potential of these VQ35DE engines... w/o getting all SERIOUS about massaging the engine! (FI)
congrats and enjoy!
been running mine since last September, along with the 06 Air Box, Z-tube, drop-in filter, MD spacer and 06 mid-pipe.. what a sweet state of bolt-on mods to bring out the potential of these VQ35DE engines... w/o getting all SERIOUS about massaging the engine! (FI)
congrats and enjoy!
This is directly from the Infiniti Factory Service Guide...
Revision: 2004 November 2004 G35 Sedan
SERVICE DATA AND SPECIFICATIONS (SDS)
Tightening Torque
Exhaust system connections:
Between three way catalyst and exhaust front tube: 39 ft-lb
Between exhaust front tube and center muffler: 30 ft-lb
Between center muffler and main muffler: 30 ft-lb
Exhaust mounting bracket: 21 ft-lb
Center muffler mounting bracket: 10 ft-lb
Main muffler mounting bracket: 10 ft-lb
Bringing this back from the dead with another good review for the HR Y-pipe. I just had it installed this weekend. The first thing I noticed was a slightly deeper tone from the exhaust. Secondly, I was made well aware of the usefulness of the rubber dampers. The old y-pipe used to vibrate a hell of a lot, especially starting from a stop, no more. And lastly, as many have stated before, there is definitely a noticeable increase in throttle response. Overall, very happy with this money-friendly mod.
Joined: Aug 2003
Posts: 6,573
Likes: 72
From: Kansas City
More satisfied customers 
It's still one of my favorite mods. I'm just in love with the sound of my 03 with the HR Y and 05/06 middy. Deep, mellow, sporty. No ricey sounds and docile at speed.
It's still one of my favorite mods. I'm just in love with the sound of my 03 with the HR Y and 05/06 middy. Deep, mellow, sporty. No ricey sounds and docile at speed.
It seems like most of the satisfied users of the HR Y-pipe are sedan drivers... has anyone installed one on a coupe with the revup engine (2007?). There is no reason that it 'shouldn't' be the same on the revup coupes right?