Can't find this answer anywhere, but I have a 04' G sedan with the sport suspension. Is the sport suspension from a coupe the same? I need new struts and shocks and all I find is the ones from the coupe. I installed the G/Z spring set up and realized at the end that the rear shocks are bad.

No, they're not exactly the same, but they're interchangeable, and the shocks from the coupe would be better for you anyway since you have coupe springs.

Matching the spring to the shock/strut is always the best way to go.

Thank you for the response. But since I have the Z springs in the back the Z shocks would lower the car more than I would like. I'm trying to keep the same height as with the sedan sport strut and shocks while using the G/Z combo. Basiclly looking for compatible struts/shocks to sedan sports. All the ones I find are coupe sport. Thx

Springs determine ride height. Not shocks or struts.

If you have coupe or Z springs ( I prefer Z front and coupe back, to levels the car) and sedan shocks, unless the shocks are aftermarket (like TOKIKO) they will start leaking in 6 months.

^ Since his shocks are the sport (red) ones, they might last a little longer, but it's still better to run shocks designed for the springs.

Shock pistons have an ideal range of motion. If you lower the car without changing your shocks, the shocks will be outside that tolerance and could be more prone to bottoming out (which will destroy them quickly)

That's why your best bet is always to swap the springs and shocks/struts together instead of springs only.

Again, it's the springs that determine the ride height, not the shocks (unless you were so far out of tolerance that it bottomed the shock before compressing the spring, which would be pretty much the worst setup in history LOL)

Answering your original question; if you have coupe springs in the front and Z springs in the back, then perfectly matched shocks/struts would be best... (Z struts, coupe shocks in the back)
However, coupe shocks/struts all around would be a close second, especially considering that some of the coupes and Zs actually have the same exact front springs anyway.

Thanks for all the help guys...I will just match the springs with the struts/shocks. Also to clear up post #513 I do have Z springs in the front and coupe in the rear. Also after riding around today the rear has evened out equally, but still replacing all 4 corners.

I have 235/50 tires so there's still a little gap but 18"coming soon.

I run 245 40 19s on 8" -35 offset wheels (-30 is perfect but hard to find). It's the same rolling circumference as stock (18" sport) so the speed-o is correct. The only disadvantage is that 19" tires are harder to find and more expensive than 20s.

Anyone confirm that the ISR long tube headers fit the awd sedan guys? I got an 05

My 2005 G35 RWD sedan started making noise after front brake pads and rotors replaced and instrument cluster removed (that's right - finally pulled the trigger on having it repaired to fix fuel gauge). These two jobs were done back to back, so I can't put a finger on any one job. Noise occurs when driving and letting off the gas pedal. Noise comes from the front of the car and it seems like it comes from the driver's side. It sounds like I have a loose part in the engine compartment/suspension.

Any idea??

Does it feel weird when you press on the brakes?

I found out that my alternator wasn't working and didn't charge the battery. Car lost power and I was stranded on the road. So, it has to be something that works off of alternator or if there is enough electrical power.