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Old 13th August 2011, 10:31 PM   #1 (permalink)
nick the tubman is feeling very pleased !
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JapSpeed Exhaust Evaluation

Hi Guys,
Having one of the first ever new JapSpeed Exhaust De-Cat systems just fitted, I thought I would share my evaluation…

It consists of full de-cats, downpipes, super large 3.5” Y pipe with Resonator, 3.5” all the way to a new type of back box design, onto blue tips which are very, very nice.

There are 2 types of systems, the 1st being superstreet, which is LOUD. 100db`s static and 110db`s at 5,000rpm. Although that is very loud, it sounds awesome and is very liveable on a day to day basis.

At a 3,000rpm cruise on the motorway it is no more intrusive than it was before with the Miltek “Y” pipe, so long journeys are not a problem.

Hit the LOUD pedal and at around 3500rpm, there is a bark that makes pedestrians jump out of their skin, followed by an amazing hard edged rasp upto the redline.

My mates reckon it sounds like a cross between an Aston, Zonda and an F1 car, with a hint of Skyline underneath….. I cant complain about that!


The 2nd system is a more track friendly system with a silencer in place of the resonator in the centre section. This should bring the DB`s down by 10 hopefully.

I am having the 2nd system fitted next, as I want to track the car, so will report back on that once installed and few days driving again.

Quality wise it looks spot on. The de-cats fitted perfectly, as did everything else. The hardest part of the install was getting the old Cats off… they are a nightmare. If you are going to do it, start with the passenger side, makes the drivers side easier as you can get ya hand over the top of the prop.


Once installed the system looks bloody fantastic. I am very, very pleased with it. Quality, looks, sound - its all there.

The guys at JapSpeed were fantastic too, brews all day and they worked non-stop all day to get it done.

Not sure on cost yet, as it is under trial, but I am told it will be one of the most competitive systems out there.

All in all, very impressive system and I fully recommend it.


here is the kit prior to fitting.


comparison of Y pipe against the beautiful Miltek. you can see the size difference...



back box is lovely...



although HUGE, its a lovely fit...



left hand de-cat is a great fit.


as is the right one...


tips look sensational







very very nice...



so thats it. i am very, very pleased.
i will update as soon as the new silencer is fitted for track day friendliness...
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Old 13th August 2011, 10:57 PM   #2 (permalink)
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Looks great mate and good review, are you getting any drone from the setup?
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Old 14th August 2011, 12:09 AM   #3 (permalink)
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Great write up Nick, quality looks great, be interested to see the "track friendly" version along with pricing.
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Old 14th August 2011, 09:10 AM   #4 (permalink)
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Looks lovely. Be interested to hear how the track friendly version performs.
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Old 14th August 2011, 11:01 AM   #5 (permalink)
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not sure about "drone", hardly any TBH.
any change of exhaust will bring a sound change mate, with a potential for drone...
i will know for sure when i drive over to the `Ring in a few weeks.

"drone" depends on which gear you are in, what speeds and revs you hold and for how long... even a simple Y pipe could give you that.

but as i love flipping through the box, i cant say i have noticed... and it sounds SOOO bloody good.
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Old 14th August 2011, 12:43 PM   #6 (permalink)
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Is every part of the system larger bore e.g would it fit to stock downpipes?

Looks good and massive!
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Old 14th August 2011, 12:54 PM   #7 (permalink)
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Do you have a better pic of the tips, perhaps a full rear shot?
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Old 14th August 2011, 12:58 PM   #8 (permalink)
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Is this the Japspeed who do Skyline bits?
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Old 14th August 2011, 01:02 PM   #9 (permalink)
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yes it is Mook. they are starting to do some tasty R35 stuff too now.
@ Stevie, yes it will fit to stock downpipes mate.... we tried it that way before we removed the cats.
i will get a better pic up later today - just waiting for the sun to come out!
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Old 14th August 2011, 01:04 PM   #10 (permalink)
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Awesome. Glad I signed em up
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Old 16th August 2011, 08:53 AM   #11 (permalink)
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Great write up nick. It was a pleasure to have you over for the day, so big thanks for testing the exhaust for us.
We will hopefully be seeing you soon for our next test!
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Old 16th August 2011, 09:10 AM   #12 (permalink)
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Nick, I didn't realise you were local Would be good to see your new zorst when you have a min. I'm only a couple of junctions away
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Old 16th August 2011, 12:18 PM   #13 (permalink)
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I already have a miltek y-pipe but would be interested in the rear section from y-pipe back if it would fit the miltek, as from what i've read, the cat back miltek makes the car quieter than with just a y-pipe which is no good.
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Old 16th August 2011, 12:46 PM   #14 (permalink)
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Looks really nice.

Could they have hit the holy grail of a fully decatted system that is track day friendly?
Be very interested to see power gains and dBs for the track day version.
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Old 17th August 2011, 09:50 PM   #15 (permalink)
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Quote:
Originally Posted by David.Yu View Post
Could they have hit the holy grail of a fully decatted system that is track day friendly?
I really hope so as im desperate for a track friendly exhaust especially one in which is good for Bedford.
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Old 18th August 2011, 08:55 AM   #16 (permalink)
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Quote:
Originally Posted by Rich001 View Post
I already have a miltek y-pipe but would be interested in the rear section from y-pipe back if it would fit the miltek, as from what i've read, the cat back miltek makes the car quieter than with just a y-pipe which is no good.
Couldn't agree more Rich!
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Old 27th August 2011, 09:15 AM   #17 (permalink)
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Any updates on the track version?
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Old 27th August 2011, 10:18 AM   #18 (permalink)
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Is there pricing out there yet guys please?

Cheers
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Old 27th August 2011, 10:22 AM   #19 (permalink)
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Looks like a very nice quality system, if price excludes GT-R tax, and it fits stock down pipes, I'm going to be sorely tempted
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Old 30th August 2011, 08:52 PM   #20 (permalink)
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this kit is stunning chaps. had a look under the car on friday and looks as good as the day it went on.
no prices as yet, but i have been told it will be the best value system on the market and WITHOUT the GTR tax.

the silenced middle section is in production and going through testing. should be ready for my car by end of september.... sorry chaps, cant get it any sooner.

and yes i agree about the miltek. whats ther point of spending all that dosh for a muted effect.
hence why i agreed to test the japspeed system...
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