The GKTECH Polyurethane subframe conversion bushes are a direct replacement of the standard items and allow you to fit an S14/S15 rear subframe in your S13/180sx, aswell as R33/R34 rear subframe in your R32.
The Polyurethane bushes also ensure that movement of the subframe is kept to a minimum. They eliminate axle tramp whilst also raising the subframe 10mm which helps to correct the roll center on lowered vehicles.
- ShA 80 Polyurethane
Want more technical information on the subframe conversion, differences between S13 and S14 subframes and a look into the design process?
S-Chassis rear subframe comparison
We can only confirm fitment for the vehicles listed above under vehicle compatibility. If your car is not listed there, then we don't know if it will fit.
Do you make these to suit other cars?
We only sell the parts listed on our website. If it's not listed on our website, then we don't sell it. Sorry.
However, we do sell the same bushes in solid aluminium, which can be seen here:https://au.gktech.com/solid-subframe-conversion-bushes
What's the advantage of using the GKTech polyurethane rear subframe conversion bushes?
Besides allowing you to install an S14/S15 rear subframe in your S13 as well as anR33/R34 rear subframe in your R32.The polyurethane bushes offer a more solid rear end which equals to a better driver control and feel for the rear end of the car. The S14/S15 subframe has better geometry than the S13 unit and also offers more track width. The Gktech polyurethane bushes also raise the subframe 10mm, improving roll centre correction.
What modifications are required, is this hard to fit?
The only modifications are firstly, the OEM front brace will need to be slightly bent to reach the mounting holes. Secondly, being a larger subframe you will need to massage the body and chassis rails slightly, as the subframe does make contact. Apart from that no modifications are required, simply just remove and refit the bushes.
Is there anything else needed for installation?
No, you can use your OEM hardware, in terms of the bushes themselves, they will arrive as shown in the product photo.
Can I install this myself? If so how long will installation take?
Yes, provided you have general mechanical knowledge they are relatively straightforward. Installation time should be around 1 hour once the subframe is out. However, being a suspension component we recommend only a trained professional to install this product.
Do these cause much vibration/noise in the cabin?
Not really. Obviously, anything solid or more rigid is going to cause an increase in noise and vibration however, I'd hardly say that it's noticeable being Polyurethane. Chances are if you're installing these you've already got coilovers, your car is lowered, you've got an aftermarket exhaust etc. etc.
Do these bushes change the height of the subframe?
Yes, they raise the subframe 10mm, which improves roll center. Will I have to get a wheel alignment after installing these?
Considering the subframe has been removed and refitted 10mm higher, this will change your alignment. If any suspension changes are made we do recommend a wheel alignment.
Do I need to remove the OEM inner sleeve when installing these bushes?
Yes, the OEM inner sleeve will need to be removed, which can be seen in the install video above. This needs to be done as the Gktech bushes are a direct replacement of both the inner sleeve and the bush.
R32 SKYLINE GTS-T
S13 CA18 180SX
S13 CA18 SILVIA
S13 SR20 180SX
S13 SR20 SILVIA
Hi I totally ordered the wrong bushings but a friend of mine actually needed these so I have them to him and ordered the correct ones for me
Hi Clint, how can I help you with shipping?
Great! Costumer service and shipping was amazing fast. I had many questions before I bought my item and was quickly answered. Thanks a lot guys 🙏
Pretty well. All in order. Thanks guys!
Haven't installed the bushings as yet, but i can say dealing with gktech was easy and made easier because there an Australian company.
The poly bushings arrived in a nice little box. Look very nice, precision manufactured parts, clean and neatly packaged. Unfortunately they are still in the box but I will be happy to express how much I love the ride with poly bushings at the connection point for the rear suspension system. I have used poly before and love the very solid connection without harsh vibration or noise. I look forward to trying many of your parts in the future. Thank you!