The GT4 class of race cars have been around for more than a decade, so it's no surprise that there would have been some oddballs in that time. Here are 5 of my favorites...
1: Ford Mustang FR500C
Built by Multimatic (the same people that build the current Mustang GT4), the FR500C GT4 featured a 5 litre V8 that produced 420 HP and propelled the Mustang to 2 manufacturers titles in the Koni Challenge. A series that is known as the Michelin Pilot Challenge today. Several attempts were made by rivals to get the car slowed down, whether it be through gear ratio changes or adding weight. The FR500C GT4's sheer pace earned it the nickname 'Boy Racer' among Ford executives. Later down the line the car was slightly modified to allow it to compete in the GT4 European Series.
2: Mazda MX-5 GT4
From a big V8 brick to a small, light sports car. The MX-5 GT4 was designed by Mazda and built by Jota Sport to be offered to privateer teams for 2013. Now you may be thinking that this would be a nice budget entry into GT4. Well, you'd be wrong, the MX-5 GT4 costed a staggering $200,000 from new. However, $200,000 does get you a turbocharged version of the NC MX-5's 2 litre inline four that puts out 316 HP. That's nearly double the amount that the road car puts out. Surprisingly, the MX-5 GT4 could hold its own against the Aston Martin and Lotus offerings of the time.
3: Jaguar F-Type SVR GT4
Time for my favorite GT4 car, the F-Type SVR GT4 was produced for the Invictus Games Racing team to use in the GT4 class of British GT, and a one-make series that never really got off the ground. The Jaaaaaaaag features a 5 litre supercharged V8 that sounds like a thunderstorm trying to pass a kidney stone and is good for 450-500 HP depending on BoP. Unfortunately, the F-Type SVR GT4 hasn't seen any real success, but it still sounds good, which is all that matters.
4: Toyota GT86 GT4
It may be ugly, but at least it's fast. The GT86 GT4 was used in the Britcar series and later, British GT. It features a 2 litre 4 cylinder that is capable of putting out 400 HP. However, it only lasted one season in British GT before the program went out the window. At least we don't have to look at it anymore...
5: SIN R1 GT4
Imagine if you combine a Renault RS.0.1 and a Lotus Exige, you'd probably end up with the SIN R1 GT4. Inside this extraterrestrial of a car is a 6.2 litre V8 that can produce 380 HP under BoP conditions. The R1 GT4 has raced in multiple series like the GT4 European Series and the Pirelli World Challenge. The car has never been a world beater, but what do you expect from a car that looks like a pissed off wasp.