The Tamiya TRF419XR comes with a 2.25mm lower and 2mm upper deck as standard equipment. Both are machined from high-quality carbon fiber with blue-anodized aluminum parts bolted to it.
In this step, we’re going to be attaching the bulkheads, inner front/rear arm mounts and steering posts.
![](http://static.competitionx.com/uploads/2010/07/section-nav-arrow1.gif)
Most of the screws feed into aluminum parts; again, we would normally use blue threadlocker to help keep the screws in place. This too seems to be a product of discussion regarding possible flex issues. While I would suggest blue threadlocker on any screw going into aluminum, I chose to only use it in certain areas. Those will be called out.
![Tamiya TRF419XR Touring Car Build - Part 1 - Chassis Bulkheads | CompetitionX](http://static.competitionx.com/uploads/2019/04/tamiya-trf419xr-chassis-p1.jpg)
The front and rear bulkheads are directional, designated by the A and B printed on them. Another way to check left and right is the ‘lip’ on the U-part of the bulkhead; that lip should be to the outside of the car.
![Tamiya TRF419XR Touring Car Build - Part 1 - Chassis Bulkheads | CompetitionX](http://static.competitionx.com/uploads/2019/04/tamiya-trf419xr-chassis-p2.jpg)
Attach the left and right bulkheads to the front of the carbon chassis. Note orientation.
![Tamiya TRF419XR Touring Car Build - Part 1 - Chassis Bulkheads | CompetitionX](http://static.competitionx.com/uploads/2019/04/tamiya-trf419xr-chassis-p3.jpg)
The TRF419XR uses 05G front inner arm mounts.
![Tamiya TRF419XR Touring Car Build - Part 1 - Chassis Bulkheads | CompetitionX](http://static.competitionx.com/uploads/2019/04/tamiya-trf419xr-chassis-p4.jpg)
Attach those to the chassis as shown. Blue threadlocker is OK to use here.
![Tamiya TRF419XR Touring Car Build - Part 1 - Chassis Bulkheads | CompetitionX](http://static.competitionx.com/uploads/2019/04/tamiya-trf419xr-chassis-p5.jpg)
Attach the steering posts. Blue threadlocker is OK to use here as well.
![Tamiya TRF419XR Touring Car Build - Part 1 - Chassis Bulkheads | CompetitionX](http://static.competitionx.com/uploads/2019/04/tamiya-trf419xr-chassis-p6.jpg)
Moving to the rear, attach the left and right bulkheads and the XA rear inner arm mounts. Blue threadlocker on the XA mounts is suggested.
![Tamiya TRF419XR Touring Car Build - Part 1 - Chassis Bulkheads | CompetitionX](http://static.competitionx.com/uploads/2019/04/tamiya-trf419xr-chassis-p7.jpg)
Attach the two motor mount halves to the chassis. Note the holes used for attachment. You can add additional screws to change the flex characteristics.
That was a simple few steps – not difficult at all! Clear some space and let’s get to Part 2 – the rear differential!
Tamiya TRF419XR Touring Car Build – Opening Page
Tamiya TRF419XR Touring Car Build – Part 1 – Chassis/ Bulkheads
Tamiya TRF419XR Touring Car Build – Part 2 – Rear Differential
Tamiya TRF419XR Touring Car Build – Part 3 – Driveline
Tamiya TRF419XR Touring Car Build – Part 4 – Steering
Tamiya TRF419XR Touring Car Build – Part 5 – Suspension
Tamiya TRF419XR Touring Car Build – Part 6 – Anti-Roll Bars
Tamiya TRF419XR Touring Car Build – Part 7 – Shocks
Tamiya TRF419XR Touring Car Build – Part 8 – Final Assembly