Radical SR4 chassis number 1 was built for Radical Co-Founder Phil Abbott and was used as the show car for the public release of the SR4 at the 2004 Autosport international show.
Radical SR4 chassis number 2 was originally built for Radical Co-Founder Mick Hyde. It is currently a silver car (may be wrapped) with a Dry sump Kawasaki ZZRR1200cc engine with flat slide carburetors. The car was used as a rental car
Radical SR4 chassis number 9 is a blue car that was originally equipped with a ZZR1200 engine. In 2019 Doug Knox purchased the car with a blown engine and is converting the car to use a 2014 CBR1000RR Fire blade engine. In June 2020 the car was located in the UK. In April 2020 the car was located in the UK and is with a new owner and has been painted black.
SR4 chassis number 31 is a yellow car with a 1300cc fuel injected dry sump engine. In March of 2023 the car was owned by Giuseppe Bellini and is now orange and located in Sicily.
Radical SR4 chassis number 36 is a red car with a 1547cc Suzuki fuel injected / dry sump engine (rebuilt spring 2018), Intrax triple adjustable dampers. The car was originally owned by Mike McGinley from Kansas who won two Midwest Division CSR Championships and finished 6th at the 2006 SCCA Runoffs. At that time the car was red with silver graphics. He sold the car in late 2009. The car was sold again in July 2018 on Bring a trailer. At that time the car was red with black graphics and was located in Vacaville, CA
Radical SR4 chassis number 45 is a blue car with a 1500cc engine. It has a rear diffuser and the optional Intrax triple adjustable dampers and Stack dash. In November 2020 the car was located at Team Stradale near Chicago.
Team Stradale
2006
46
Radical SR4 chassis number 46 is the first SR4 built in the 2006 model year.
Radical SR4 chassis number 47 is a white Right hand drive car with a 1340cc engine and Carbon Bi plane wing. In April 2019 the car was owned by Antonis Milou and resided in Cyprus.
Radical SR4 chassis number 48 is a red car with a Kawasaki 1200cc engine. It has an aluminum rear wing, Triple adjustable dampers and a fuel cell. In October 2019 the car was located Warwick UK.
Radical SR4 chassis number 52 is a green right hand drive car that originally had a carbureted Kawasaki ZZR 1200 engine. This car was originally a Works car driven by Mick Hyde. In May 2023 the car is now grey and has a fuel injected ZZR1400cc engine.
Racecarsdirect
2007
55
Radical SR4 chassis number 55 is the first SR4 built in the 2007 model year.
Radical Sportscar Registry
2008
63
Radical SR4 chassis number 63 is the first SR4 built in the 2008 model year.
Radical Sportscar Registry
2009
66
Radical SR4 chassis number 66 is the first SR4 built in the 2009 model year.
Radical Sportscar Registry
2010
67
Radical SR4 chassis number 67 is the first SR4 built in the 2010 model year.
Radical Sportscar Registry
2011
83
Radical SR4 chassis number TBD is the first SR4 built in the 2011 model year.
Radical Sportscar Registry
2012
87
Radical SR4 chassis number 87 is the first SR4 built in the 2012 model year.
Black car with orange graphics, 1500cc engine with 0 hours, air jacks, carbon Le Mans mirrors, Brake pressure sensors, F&R floating rotor upgrade, Intrax 1 way dampers, Clear rear lights, 24v strating system, Reversing differential, Fuel drain out kit. Car is located in Weston-Super-Mare England
Radical Sportscar Marketplace
2013
No SR4s were built for the 2013 model year
Radical Sportscar Registry
2014
91
Radical SR4 chassis number 91 is the first SR4 built in the 2014 model year.
Radical SR4 chassis number 94 has a paddle shifted 1600cc engine. It has the optional front and rear 280mm floating rotors, Air jacks, , brake pressure sensors, FiA Fuel cell, and Intrax triple adjustable dampers. In February 2022 the car was located near Torino Italy.
Radical Sportscar Registry
2015
94
Radical SR4 chassis number 94 is the first SR4 built in the 2015 model year.
Radical Sportscar Registry
2016
97
Radical SR4 chassis number 97 is the first SR4 built in the 2016 model year.
Radical SR4 chassis number 99 was the last SR4 built. It is a white and blue car 1340 engine, used for Hill climbs. Located in Siracusa Sicilia (Italy)