MKIV Supra Tunnel Cover Assembly
Auto-to-Manual Swap
Tunnel Conversion Made Easy
JULY 2025 UPDATE -- We now have a new VERSION 3 tunnel that does not require as much cutting and is even easier to install. We also lowered the price as this new version is easier for us to make. It's a WIN-WIN for all! From July 2025 all customers will get the latest version 3.
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Doing an auto to manual swap on a Toyota Supra MKIV or Lexus SC chassis? One of the biggest hurdles is the converting the tunnel over to the OEM manual tunnel. Not anymore... This tunnel cover allows for a clean installation, and will seal your Supra up from outside elements, heat, exhaust gas, etc.
This tunnel conversion cover was created specifically for the MKIV Supra auto to manual conversions to fit the new Magnum-F transmission.
It may fit other transmission swaps as well as the T56, but I can not guarantee fitment. I know the V160 WILL NOT fit due to the shifter mount on the top center.
This cover was designed and fabricated in house as a much easier solution to swapping out the entire manual 6-speed tunnel swap. This can be done with the dash still in the car! This method saves a ton of work over doing the 6-speed tunnel swap, and leaves the car with a clean, airtight tunnel.
The kit includes the fabricated cover, high quality rubber shift boot, chrome securing ring, and template to use when cutting the tunnel.
This is a bolt in kit, no welding is required. It does of course require cutting out the tunnel to properly allow the fitment of the billet shifter handle. Cutting the auto tunnel is required with any manual transmission conversion, as the auto hole sits too far back.
These are currently only available for the MKIV Supra but I am planning on developing these for more chassis going forward.
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This template link below is for the V3 tunnel (has a square front edge, not angled.
This template link below is for the pre-July 2025 "Version 2" tunnel (This tunnel has an angled front edge)
