Car Feature>> Bozz Speed Evo 6

The fascination with time attack is something that has really captivated Japanese tuners over the years. The urge to push modified road cars to their limits for that all-important lap time is something that has helped create some of the most impressive vehicles we have ever seen. But to me it's the end user that impresses the most; and enthusiasts in Japan really don't do things half way. I guess if you are going to do something, you might as well do it well.

This Lancer Evolution VI to me represents a perfect example of just how far people are willing to go when searching for that magical time. 

It looks wild when in action…

…and once you take a look under its hood you begin to understand why it needs copious use of downforce-enhancing wings and canards. With its 620 HP it would probably take off! But seriously, this is one of the most impressive 4G63 builds I have come across, put together by Hisada-san of Bozz Speed, a famed and respected Evo and Impreza tuner in the outskirts of Tokyo. I met Hisada back in 2003 when I first shot his street going GDB. I remember he took me out for a quick ride and it was probably the first time I had felt the savage acceleration of a highly tuned EJ, not to mention the silly amounts of traction the AWD driveline provided. The motor in this Evo has been put through a complete rebuild where it gained a capacity boosting bottom end (now just under 2.2 L) comprised of a JUN balanced crankshaft with longer stroke, JUN H-section connecting rods and 85.5 mm Cosworth pistons. Hisada had the head completely reworked by NAPREC who polished, ported and fitted it with 280º HKS high-lift cams.

The upgrades were necessary to prepare it for the savage 2 bars of boost the Trust TD06SH-25G turbo charger would supply. Above you just about see the custom intake pipe that connects the compressor to the HKS sponge filter nestled low, behind one of the bumper's intakes.

The externally gated blower is fitted onto a Trust manifold which has been heat wrapped to help keep engine bay temperatures a little lower.

Once compressed the air is cooled via the HPI race-spec intercooler before being passed onto the Sard intake plenum via the Nissan Pulsar 80 mm throttle. Four 1000 cc/min injectors are kept topped up by the two Power Enterprise fuel pumps in the trunk.

I met up with Hisada at Tsukuba to see the first shakedown of the car. For this initial session boost was kept low and progressively raised as the mechanics kept a close eye on all engine parameters. 

You can't help but love the rawness of this car. Everything that has been changed has been done for in the quest of performance, not looks. That's why the Bozz Speed carbon doors and…

…the front-downforce-enhancing custom canard plates have been left unpainted. Race spec Quantum T3-CR dampers are mated to Nova springs, 16 kg/mm front and 14 kg/mm rear.  Hisada also fitted Bozz Speed lower arm bushes to tighten up the handling as well as thicker Cusco stabilizers, front and rear. With a lot of weight having been stripped from the car it was decided that the stock Brembo brakes would suffice for the time being, their performance boosted by a set of Winmax Zelos track-spec pads, CF5 up front CF4 rear. Wheels are now discontinued Rays Engineering Volk Racing SE37K, a favorite lightweight wheel of mine which was available before the RE30s were released. For better turn in and front end bite the fronts are slightly wider at 9.5Jx17" compared to the 8.5Jx17" rears. Tires are Bridgestone Potenza RE55S 255/40R17 all round.

A Cusco roll cage stiffens the chassis and keeps the driver safe in case of an accident. Seating is only for one, in the form of a tight Sparco bucket seat.

Engine management is handled by the HKS F-Con V Pro neatly fitted inside the compartment usually reserved for the passenger-side airbag.

All the top tuners in Japan use the Neko Corporation AF-700 A/F meter, offering an accurate reading from the lambda sensor. Next to it is the HKS boost gauge that reads to 2.5 bar!

Literally everything has been ripped out of the interior.

A quick peek in the trunk reveals the Sard collector tank and Cusco carbon strut brace.

The Bozz Speed canard plates have been fitted onto the M-Technique front bumper to try and generate as much front downforce as possible…

…to counter balance the massive effect of the rear Esprit carbon GT-wing.

Even during this first test on track the Evo was nudging the 1-minute flat barrier at Tsukuba, hinting at the potential the car possesses. I'm not quite sure if it has seen the track again after this first outing but if I had to take a wild guess I'd say it would easily get into the 57-seconds. Now that is a quick track day tool!

Bozz Speed

-Dino Dalle Carbonare



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Seen this car a while back in Performance Imports magazine...also by Dino! It's funny I've only read up on Speedhunters from the end of last year, and flicking back through a lot of old magazines, so many features was by Dino!! Keep up the great job!


great feature Dino! betcha this ain't really the hardest core it could get.


Um, might be rude to ask, but any more info on the impreza in pic 8 ?


just thinking the same about the impreza in pic 8!


I have the recent issue of Modified, which has this car featured in it, and with this feature, I can say that I will soon attempt to build this car in 1/24 scale. Thanks Dino!!


this thing looks like a 'Time Attack' demon, love the metalwork at the front end, those canards seem to do the right job.. if its putting down times like 1min round Tsukuba and there's potential for more time shaving speeds!![?] - thanks for this one.


Is no one else curious why such a thoroughly sorted car was put together with a such a crappy bolt in rollcage and improperly mounted harnesses? "A Cusco roll cage stiffens the chassis and keeps the driver safe in case of an accident." - Thats a joke right? Its a great car, dont get me wrong, but Im wondering if the real issue is that this customer ran out of money before safety and braking were addressed.


needs diffusoooaar!


Stock Brembos are lighter than most aftermarket, remember they just need to work for one lap. Cage regs are more lax in Japan as well I think.


@Clark: you are totally right about the Cusco rollcage. This particular rollcage is an excellent show-car rollcage that does NOT protect the driver much (especially in a car with 620HP). Are you kidding?

But, as you would discover, Dino is the type of guy that likes to "omegoroshi" Japanese companies (kiss their a$$e$ if you will), so that he can keep posting stuff like this.

I am a die-hard fan of Japanese tuning, but I have to admit that Japanese tuners are FAR behind many other nations when it comes to safety and stiffness of a chassis. They ALWAYS cut corners in this sense. Maybe some day they will catch up.


It was an article in sport compact car about bozz that got me into the import scene. I remember reading about and evo4 that had to do a cool down lap after two laps because the trans couldnt handle it. Another was doing a all wheel drift smoking the tires in third. Just amazing what these guys do with some lancers.


Kinda surprised they're not using some kind of rear diffuser there?


Love it, easily my all time favourite AWD car, both the V and VI. Hope to import one some day $$.

Great Feature.


EPIC aero and engine


Nice but I don't like the front. It just looks...well, bad.


i love this style over all the evo's... sexy beast


Also wondering why they dont even bother to get a real cage


Sick. 620hp, awd, carbon doors, all this and more for 1minute laps. Was helen keller driving? I understand they were shaking the car down but damn.


The only thing that confuses me is the use of a bolt-in roll-cage in a build this wild. Youd think he'd have a welded unit. Awesome car, though.


this car is awesome how much you are selling it


A very stunning looking Evo.


great feature, interesting to see the earlier evo's featured


Loved reading about this car in Sport Compact Car back in the day (Maybe 2002? I remember they called it the Wizard of Bozz or something? ...Yep, here's the article for those interested:

Glad to see that it's still kicking around, if in fact it's the same car.


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