The SPL traction link is adjustable for length. Making it longer reduces roll toe in and making it shorter increases it. We don't play around with this too much on a car that is used for road racing and generally leave it at near the stock length. For drift cars, we have used this adjustment quite a bit. 

The SPL traction link is made of tig welded thinwall 4130 chromoly tubing. It uses high-quality FK bearings with electroless nickel plated 4130 adjusters, paired with 6061 aluminum lock collars and titanium hardware- just like the front upper arm. 

The latest SPL links are made of CNC-machined 7075 billet aluminum but we still like the older tubular parts as well. The SPL links are quite a bit lighter than the stock parts and stronger as well.


The SPL camber link has all the same features as the traction link. The main advantages are that it is stronger and lighter than stock while eliminating the soft rubber bushing and replacing it with an FK spherical bearing. 

The camber link allows for a lot more camber adjustment than stock with no chance of slipping.


The SPL Parts toe link, like the other links, is lighter and stronger than stock with the same high-quality hardware features.  

The toe link will not slip and has a wider range of adjustment than stock.


We also got SPL Parts rear knuckle monoball kit. This replaces the stock squishy rubber bushings in the rear knuckle with super precise FK spherical bearings. 

The bearings get rid of rubber mush and reduce friction in the suspension- all good things to allow the dampers to work more precisely and to keep the wheels pointing in the right directions under load. 

GT-R's are prone to some wheelhop out of slow corners and on drag launches, and getting rid of the rubber helps eliminate this. 


The stock Nissan eccentrics to adjust the rear toe and camber tend to slip under the high loads caused by wider, more sticky tires.

SPL solves this problem by making all of the adjustability in the links and locking out the eccentrics with this kit. 6061 aluminum spacers lock the pickup points in place and super strong 10.9 bolts maintain the clamping torque under hard use. 


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Monday, February 05, 2018 11:09 AM
What's he weight difference between the stock and the spl front upper arm?
Mike Kojima
Mike Kojimalink
Monday, February 05, 2018 11:13 AM
Unfortunately, I didn't weigh it, I don't know what I was thinking. It is quite a bit lighter.
Monday, February 05, 2018 2:03 PM
just asking cause you guys made similar claims about some of the parts on Project C7 Corvette which weren't exactly true...
Mike Kojima
Mike Kojimalink
Monday, February 05, 2018 2:32 PM
We got the wrong info from a PR agency. Its different for a project I am entirely responsible for where I selected the parts and know all about them. That was an unusual case.
Tuesday, February 06, 2018 7:47 AM
Take the damn thing to the track! I want quantification!

Are you not going to run out of brake again once you up the power?
Mike Kojima
Mike Kojimalink
Tuesday, February 06, 2018 9:32 AM
possibly but you can't fit in much bigger!
Tuesday, February 06, 2018 3:03 PM
How bad is the NVH? Is it still streetable or painfully loud?
Mike Kojima
Mike Kojimalink
Tuesday, February 06, 2018 3:22 PM
The NVH hardly any different from a noise/harshness standpoint and the overall ride is a lot smoother. I think a lot of this is the stock run flat tires have really stiff sidewalls and are heavy which adds to the unsprung weight.
Thursday, February 08, 2018 5:12 PM
Car looks beautiful. It must be a thrill to drive!
Monday, February 12, 2018 12:00 PM
After seeing those SPL parts, I knew they'd be pricey. Just 2 upper control arms alone are $1250.
Mike Kojima
Mike Kojimalink
Monday, February 12, 2018 1:17 PM
so would you put cheap shitty parts on a GT-R?
Monday, February 12, 2018 5:54 PM
I wasn't trying to be negative. I'd probably go same route with GT-R. Wish my track car had aftermarket support instead of trying to get machinists to make one-off parts.
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