So I picked up a q40 last week. Unfortunately g37 sport sedan is no longer offered. I really liked the g37 sport sedans appearance.

I would like to mod my wheels and suspension for a sport appearance while maintaining a comfortable ride.

What is the best option for suspension(not including coilovers*) eibach ,H&R, or Swift, with Koni yellows?

What caber bolts or kit will I require to not encounter alignment issues?

I will be going for 18" or 20" wheels in the future not staggered but this will be last.

 

I was doing some searching and the last year koni yellows were offered is 2012 coupe will that set work for a 2013 journey sedan aka 2015 q40

 

The suspension hasn't changed so they'll work fine
I know you said no coilovers but might consider these, they'll perform better than springs w/ OEM dampers, are rebuild-able, and made in Japan
And the price makes them even better!
TEIN Street Basis Coilover Kit; OEM Front Upper Mount; OEM Rear Upper Mount; Not EDFC Compatable INFINITI G35
And the SPC F&R camber kit would be recommended

 

hey fellow q40 owner! lol
I kinda had the same request as you, ended up getting square set up wheels and tires 255 all around ( switching to 265s now) and installed eibach springs. Springs help the handling but not much, mostly due to lowering the center of gravity. Thick tires all around definitely increase stability through turns. Just installed my rear sway bar which made good handling difference. So far I am beyond happy with the improvement of the handling with the minimal mods. Hope this helps.

 

I cannot comment specifically on the Infiniti suspension but rather for the springs v. coilover issue. The stock strut valving matches stock spring rates. You may be able to coerce the spring-only option if matching with swaybars, but it will be tough to overcome the mismatch of the spring and strut. A well-setup coilover (especially if one is available that offers ride-height and/or rebound adjustment) designed for the weight and goals desired) will be worth the extra cost (and will likely cost less in the long run.)

Example: I put aftermarket sways on the STi first (best bang-for-buck suspension mod) and quickly went to aftermarket springs. The ride was OK, but not where it needed to be. I finally decided on custom valved ASTs with Swift 8K/9K springs. These were height adjustable and had rebound control.

The difference was AMAZING. I could relax the sways to gain a more neutral feel and overnight the handling was completely transformed.

My .02 having spent a lot of time researching and tuning the suspension on the STi.

Good luck and keep us posted!

 

Yes, they will fit. If you go this route, make sure you mount them the right way--the lower spring perch can be easily mounted upside down resulting in a raised ride height.

I've done springs and OE dampers on a couple cars and was never happy with the results. IMO, quality dampers--Koni or Bilstein for example--are a must when lowering the car.

 

Hey thanks for the multiple replies. I'm leaning towards koni and swift or eibach.
I had not factored in the price of the camber kits. If I knew I could get away with just camber bolts up front it would be nice but I haven't found anywhere that says so.

 

They make a camber bolt kit for the rear (instead of using the arms) along w/ the rear toe bolt kit but in the front the only way to control camber is w/ the adjustable A-arms.

 

My front camber/toe was within spec on koni yellows & swift springs. It was the rear camber that was slightly out of spec.