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 Originally Posted by justinfox
Yes I checked the Spec IV. One piece and it's ridiculously light. A lot lighter than the dual Pro Spec I have (I love light weight so I was a little upset it wasn't insanely light lol). The Spec IV's had mixed reviews on the sound. How do you find it? Apparently it's more of a raspy sound whereas the Pro Spec is super bassy and deep.
I've got a fair bit of in cabin drone coming from this exhaust. It's pretty loud from inside the cabin, you can drive it in a way that you don't get much drone... something I will perhaps get used to. But the gains made are great. I suppose gains come at the cost of noise.
Well the genius of it is in the muffler as I'm sure your aware 
upto 5000rpm it's the same as stock when you drive normally(roof up), even with the roof up in VTEC on the track the engine sound still overpowers the exhaust in car, roof down it's all exhaust, it really opens up (sound wise) when you get into VTEC...
For example, on a track like winton or calder, the you can't hear the exhaust when the car goes past you on the straight, unlike most other aftermarket exhausts!
2007 BMW M3 Jerez Black/Palladium Silver
2002 BMW M3 Ruby Black/Black - SOLD
1999 Honda S2000 NFR/Black - SOLD
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BTW the sound is good, I've only heard compliments about it, honestly! haha maybe some people from cruises I've been on can vouch for that lol!
It's definitely not raspy, a stock exhaust w/o the resonator is raspy! I've heard the Pro Spec, definitely not that loud, it's hard to explain but I love it, too bad mines falling to bits from crap build quality :S
2007 BMW M3 Jerez Black/Palladium Silver
2002 BMW M3 Ruby Black/Black - SOLD
1999 Honda S2000 NFR/Black - SOLD
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 Originally Posted by ROLLED
too bad mines falling to bits from crap build quality :S
I'm interested to know what exactly is falling apart. Very curious as the build quality on the dual looks very good.

Beautiful design.


OEM exhaust was ridiculously heavy.

With silencers in (also, new plates! )
REVIEW:
Make: Very nice welds, love the symetrical design more than anything else. Really nice piece that splits the mufflers. Fitting was easy and perfect, ISMR guys said it was a pleasure to install, plenty of room to get hands in and around, perfect fit. Strange then that Rix had so much trouble with the DC2R design, perhaps they've picked up their game? We'll soon find out when we install and test other exhausts from the range.
Sound: Sound combined with the Injen CAI is just nuts at WOT in VTEC. Overall, a nice balance of noise coming from intake and exhaust now. Hitting the START button is a different experience too as the exhaust growls when the engine's started. The note is far from raspy, instead a very deep bassy tone. Really nice on idle. I've driven it around for a couple of days now and I have to say it generates a lot of in cabin drone. It's not that loud from the outside, but inside the car it drones a lot. You can reduce the droning, depending on how you drive it, and what gear you're in, but it's definitely not for everyone. I've fitted the silencers that came with the exhaust today and instantly noticed a lot less noise but there's still a fair bit of drone. I'd be curious to see if cutting out the main resonator and putting in a bigger hotdog would help to reduce drone, might be something I will look into in future. I'm also curious about doing a dyno run with the silencers on.
Performance: All the noise the intake and exhaust is adding makes the car feel 10 times faster, of-course, it's not 10 times faster though. Taking off at the lights and 1st into 2nd gear at slow speeds is a lot smoother, less hesitation.
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doesnt look good with silencers in imo. but i guess it would help keep your sanity when driving lol
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Nice Review and nice plates too justin
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got any vids of how it sounds
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sorry did u say something stealth?
i... canntt... concerntrate... avatarr.... tooo................ distracted...
argh i gotto go to another page
hahaha
It goes like a Zyrtec... I mean Vtec.
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ive got the same exhaust on my euro, definately not quiet
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I too am looking at getting an Ingen CAI. Then a new exhaust later on.
The problem is I just love the CAI sound, on my CRX the exhaust killed that awesome noise that comes from the CAI :-(
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how much did it cost all up?
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This is what happened to my BC exhaust! Bad design resulted in the exhaust sticking out from the bottom of the car and consequently scraped every speedbump/driveway I went over.
Maybe you should tell people that you work for BC Justinfox..
Regardless, I had to get this fixed at my OWN cost even though, it is less than 1 year old and yet was not covered under the warranty...The best BC could do was to try and sell me Justin's exhaust at a discounted rate. pretty poor.
This is the repair job. I was lucky to have the exhaust checked out in time because the crack was about 2cm from going the whole way around the circumference of the resonator.

And this is the reason why it cracked and scraped...The car is at stock ride height too...
2007 BMW M3 Jerez Black/Palladium Silver
2002 BMW M3 Ruby Black/Black - SOLD
1999 Honda S2000 NFR/Black - SOLD
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ROLLED. The way it's hanging down so low doesn't seem right at all.
I've just spoken to the team at Buddy club. Buddy club suspects an installation problem as the exhaust design really should not be hanging that low. I have a stock cat, and will fit a brand new exhaust, Spec IV (exactly the same as yours) TOMORROW. If the exhaust hangs as low as yours in your pic above, Buddy club will cover your repair costs.
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