King Motorsports Unlimited, Inc. - Mugen Performance Products for Honda and Acura

King Motorsports / Mugen EP3 Civic Si



For many of us who drive an EP3, we are proud to say that it's the King Motorsports example that inspired us to own and build one up in the first place. Debuted at SEMA 2003, this is the EP3 that more than a decade later still inspires EP3 builds all over the world. This 7th gen Civic was built by King Motorsports for American Honda.





The Nighthawk Black Pearl EP3 was based on the US-spec model and fitted with top shelf performance and body parts that showed what was possible to create from the relatively egg-shaped, minivan outline of the stock 02-05 Civic Si. In order to fit the Mugen front lip, the USDM bumper cover and rebar were replaced with JDM spec versions, which create more of a snub-nose effect in the front. The bumper was finished off with a carbon fiber radiator duct. The stock grille was replaced with a Mugen grille with JDM red badge and driver-side flared opening to allow for additional cooling to reach the Mugen air box. The iconic Mugen hood includes functioning engine bay ventilation.



The rear USDM bumper was also replaced with a shortened JDM version that allowed for the fitment of the Type-R rear lower valence. Type-R side skirts complete the lower body parts. An Mugen adjustable wing was modified for the USDM hatch and pulls out the body line in just the right places.

The changes on the pure performance side were even more significant. A DC5R motor, 6-speed transmission, Mugen ECU, the legendary Mugen twin loop exhaust... the build list goes on and on and is just incredible. It's no wonder the car has appeared in the pages of Car & Driver, Road & Track, Boost and was featured on Speed TV.




Here is the "press release" for the car:

Using Honda performance specialist Mugen's vast array of aftermarket high-performance parts, King Motorsports (the sole authorized North American distributor for Mugen Co., Ltd) has created the ultimate street performance Civic Si that maximizes the potential throughout every corner of the vehicle. Making its world debut at SEMA, the King Motorsports/Mugen Civic Si has a K20 DC5R engine and 6-speed transmission with a limited slip differential. The modified engine produces 240-horsepower.

Powertrain Modifications:

Japan Domestic Market (JDM) K20A DC5R engine
JDM DC5R six-speed close ratio transmission with limited slip
Mugen cold airbox
JDM DC5R exhaust manifold and down pipe
Mugen stainless steel twin-loop cat-back exhaust
Mugen ECU
Mugen low temp thermostat
Mugen hi-pressure radiator cap
Mugen reserve tank covers

Suspension Modifications:
Mugen N-1 coil-over adjustable suspension
Mugen 25mm rear stabilizer bar
JDM Civic Type-R front stabilizer bar
5 lug conversion with RSX Type-S brakes front and rear
Mugen Micro Mesh brake line set
Mugen MF-10 forged wheels 17x8 +45 bronze
Bridgestone S0-3 225/45 ZR 17 Tires
Rear adjustable upper control arms

Exterior Modifications:

JDM Civic Type-R front and rear bumpers
JDM Civic Type-R side skirt kit
JDM Civic Type-R rear bumper valance
Mugen carbon fiber aero hood
Mugen front spoiler
Mugen sport grill kit
Mugen carbon fiber radiator duct kit
Mugen adjustable rear wing

Interior Modifications:
Prototype Mugen digital guage cluster mounted in carbon fiber inset
Mugen S-1 bucket seat with Mugen seat rail kits
Mugen Sports Pedal Set
Mugen Race II steering wheel with Mugen hub adapter


If you are ever in Wisconsin, stop by the King Motorsports facility to see the EP3 in the showroom! Here are a few pics I took of it in summer 2010-- the EP3 is getting a quick detail and wax the day before Dyno Day 2010.













** Visit the King Motorsports online store for performance and aero parts for the 02-05 Civic Si (EP3) **