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GR Magnum Swaps
The Grannas GR series transmissions are the strongest synchro manuals in the world
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READY, IN STOCK!!!!
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Ultimate IRS Subframe
100% chromoly construction. My bolt-in MKIV Supra Subframe is stronger, lighter, and uses all the factory pickup points!
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I am just a guy that takes a lot of pride in his work! That makes a big difference in the product quality, the customer service you will receive, and the promises that are made.
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Latest News
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July 10, 2022 New Grannas Racing Offset dowel pins - when and how to use them
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June 05, 2022 Tremec T56 Magnum CLOSE ratio vs WIDE ratio. Which is best?
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June 05, 2022 What Fluid to run in your Tremec transmission and what is the break-in process?
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January 05, 2022 Cast bell changes and updates - MADE IN THE USA!
