The title says it all. I am looking to do some upgrades on my G35 AT. Nothing real big, just some miner things then go big later. I have the exhaust done, cold air intake, Hi-flow cats is all that is done right now. I am thinking about the 5/16" Plenum spacer to start. Heres the problem I would love to put on the MREV 2 manifold but for what I have read would not do any good .
What other options could I go with? Any advice would be helpful.

 

If you're gonna put a spacer on you might as well grind the first two runners down a half inch or so...search DIY plenum mod. Or just leave it as is with the plenum spacer and get a dyno tune with osiris afterwards. Don't expect anything too dramatic with whatever you choose.

 

Will I tell any difference using the 5/16" spacer or should I save my money and go another route?

 

One of my world-class grounding kits are a must for 5AT G. Check out the reviews and PM me if you are interested...

https://g35driver.com/forums/reviews...es-review.html

 

The 5/16 spacer is one of the better breather mods you can do. Definitely worth it.

 

Yea, 5/16 spacer then a tune. You well fell the diffence.Plus with the tune you'll get full throttle response and the tune will fix your AFR.

 

+1 on spacer and tune!

 

+1 on spacer and tune...also transgo shift kit is an option to think about.

 

of course after the tune your mpg will go down since you'll want to stay in the power curve as much as possible

 

You should have started with MotorDynes 5/16" spacer or even larger 1/2"! Everyone here could have told you it's the best mod you can make for your VQ motor. Once the spacer is installed you should be running lean if you bought a decent cat-back exhaust. Then you'll need a tune and enjoy RWHP gains which will make your G even more fun to drive....
Gary

 

All the upgrades were done on the car when I got it. The exhaust system I had redone because the kid that owned it put some nock off brand on it. He said the cats were magnaflow?? don't know for sure.

Were would I go to get it tuned?? Can any garage do that or is there a speciality shop?

 

An authorized Uprev dealer would be my choice since they're experienced tuning with it. Check the regional forums for recommendations for a shop in your area. What year is your car?

Don't bother with the MREV2. As already mentioned: 5/16" Spacer, Osiris Tune (dyno tuned), and the Transgo VB is a nice upgrade for the automatics. Research differential swaps, going with a taller-geared Final Drive is always fun.

 

Uprev website will show authorized dealers/ tuner shops in your area who can tune your car for you. Like Gary c said 1/2 spacer would be even better for results. Advice...do not install the spacer or any other mods until you are ready go for your tune. As quoted you will run lean and risk engine problems. You have a few options still to upgrade your to your liking. Like stated grounding kit and transgo vb kit will definitely help

 

2005 G35 Coupe automatic

Closest Shop is in KY, i am in TN does not looking promising

 

if you are good with computers you can buy the software and DIY...or plan a weekend road trip to KY