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A tough new gearbox is required // Marty's WRX STI

By Shannons - Published on 24 June 2020

Subaru 5 speed Gearboxes have a reputation of being weak, a few launches and they are often exploded into a thousand pieces. A 6 speed gearbox out of a newer STI is an excellent upgrade and in this episode with the help of our mate Benny (aka Mechanical Stig) we swap in an entire driveline into Marty's 1999 2 Door WRX STI.

Also something to note around Mighty Car Mods: we are normal guys and are not trained mechanics. We like to make interesting car mods and show you how we've gone about it, but we can't promise that anything we show you will work for your particular car, or that you won't harm yourself, someone else, your car or your warranty doing it. Please be safe, be responsible and unless you know what you're doing, do not fool around with very serious machinery just because you've seen us make it look so easy. Talk to a qualified mechanic if you are in any doubt. Some of the products featured in this video may be supplied by sponsors. For a list of our current sponsors please go to