J-Spec Garage

05/10/2026

gets one of our

Did you know our also natively lets you run an hose or a rubber radiator hose

No modifications necessary

05/10/2026

FD trigger kits by Raceonly in production as well!

No we did not forget the

We have made good progress on this trigger kit and we are getting close to production

05/09/2026

Make your Supra ECU wiring tidy and neat by using the Dewla Dezign ECU mount.

https://jspec-garage.com/products/dewla-dezign-mkiv-supra-ecu-modular-mount-system-lite-version?_pos=1&_sid=b656020df&_ss=r

05/09/2026

Progress!!!

and kits are getting closer and closer now

There’s a lot that goes into making sure we don’t miss any little things when we develop a product like this, not to mention it is the core of any system

05/08/2026

MoTeC c127 dash loom for Mk4 Supra

05/02/2026

Sometimes we build small stuff too

04/20/2026

kits have been out of stock for some time now and it hasn’t been for no reason

I wanted to make sure our kit supported our kit

There are a few options on the market

We tested a fair few variants over the last few months, our buddy nealadderley did a lot of testing on his own build and we found this design to yield the cleanest signal

We tested on 3 major platforms




It’s amazing how much difference it makes at and to have a clean rpm signal let alone under power

We all know how fussy the is about and timing

You can rest assured that we have tested this to over while maintaining a clean result

We will be opening up pre orders in 2 weeks time and anyone who currently has an FC kit on back order will automatically be upgraded to the GEN2 kit

04/12/2026

Needing some PHR parts? We have them! Including precision turbos!

02/03/2026

Another in-house wiring harness complete, this one for a Toyota Supra with a 6R80 transmission conversion. Beyond supplying a wide range of Supra and RX-7 parts, J-Spec Garage designs and builds professional-grade wiring harnesses in-house to meet your exact requirements.

12/31/2025

We’ve had a small price increase in RaceOnly parts and we’ve been asked why! This is also impacting parts from Japan!

Currently we have to manage pricing based on a few things!

1) AUD to USD conversion rates fluctuate daily!
2) Tariffs that are imposed by the U.S. Goverment. Currently we’ve been tariffed 50% on these parts due to their aluminum content!

However, we’re still less expensive than if you were to buy direct!

Our AST price is $450. USD.
We’ve paid the tariff and shipping to the USA.

From RaceOnly the AST is $585 AUD which is $392 USD. Then shipping is dependent on your location in USA. Once the package arrives you’ll pay an additional $200 in tariff making your price $592 USD plus shipping.

We hope this answers some questions about the small price increase! If tariffs change we can adjust downward!

Thanks from your JSPEC GARAGE team!

12/06/2025

We like to build stuff around here! Needing professional wiring? DM us or visit us online!

J-Spec Garage

www.jspec-garage.com

[email protected]