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Discussion Starter #1
Hi guys and girls,

I am looking to remove the stock cans and add a lower mounted slip on. It seems that the options for the B4 are pretty limited, beyond a custom job. At the moment I am looking at:

1. Arrow Thunder
2. GPR, not sure which model yet
3. HP Corse Hydroform

The hydroform is the one I want, but its nearly £600 compared to £300-£400 for either of the others. Also I am a little concerned that it may be too loud. Does anyone have any experience of any of there cans, or recommendations for something else that can be had here in the UK.?

Thanks
 

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I have the full Arrow Thunder on my 1090 and it's loud. Haven't tried it with the db killers but I'd imagine it would tone it down a little. It cleans up the side profile nicely though. Cannot comment on the other 2.
 

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IMO it has to be the arrow thunder having had both arrow and GPR , Arrow was best but was to loud for me even with the db killer, the gpr was a deeper tone but did not like the fitment.
I now have the arrow twin cans and have now found the right sound level i am looking for, have taken db killers out and put back the cat and it has a nice tone for my likeing
and runs very well and seems to be a lot smother at idle . the HP corse is the loudest of all 3. its you choice .
 

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H.P. Corse is the best looking. Very loud. Annoyingly loud to ride anywhere where noise bounces off concrete walls such as motorway dividers. Hardest to tune for smooth running down low. I also run an Arrow Thunder.

Cheers

Deano
 

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Discussion Starter #5
How loud is too loud? My bike has no cat and the stock cans, that's how it was when I got it and its LOUD. I always ride with earplugs in, but once I forgot and only made it a mile down the road before I had to pull over as my ears were ringing. its mainly for the asthetics that I am looking to change and the performance. don't want to go too loud as, I live in a terrace and don't fancy waking the entire street first thing in the morning!!

I have watched a few videos of each exhaust but phone mics always clip the audio so they all sounds as loud as each other.
 

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The Arrow are probably your best, most serviceable and solid choice IMO. If you're patient, maybe a set of MV Corse will come up on eBay with a factory chip. They were the factory upgrade and run beautifully. Loud too.

Right heel still bangs the sh** out of them though.
 

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Discussion Starter #8
Thanks for the input guys, I think maybe Arrow the way to go. I am looking for a stubby exhaust rather than the same as stock, although @Swoosht04's does look good..
 

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How loud is too loud? My bike has no cat and the stock cans, that's how it was when I got it and its LOUD. I always ride with earplugs in, but once I forgot and only made it a mile down the road before I had to pull over as my ears were ringing. its mainly for the asthetics that I am looking to change and the performance. don't want to go too loud as, I live in a terrace and don't fancy waking the entire street first thing in the morning!!

I have watched a few videos of each exhaust but phone mics always clip the audio so they all sounds as loud as each other.

It sounds like you have the race cans rather than the stock ones as my 910 ( and 750 before ) with cat removed and the original cans wasn't that much louder than stock, just a nice deeper sound. The race cans will make your ears bleed when you are on the gas.
 

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I've had both the Hydroform and Arrow. Visually I liked the Hydroform but much prefer the Arrow sound (both with DB killers in).

Track day next month with DB killer out...will see how it sounds...but i do prefer the Arrow.

Please note, based on a full race exhaust system.

990R - Hydroform
1090RR - Arrow




Cheers
 

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This is my 910s now with twin arrow pic shows decat pipe now it is running the cat with baffles out they are like pea shooters,
and hears my old 910r with arrow race can it was to loud so found a baffle on ebay that inserted between the link pipe and can and it was a really
good sound .
 

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the screen is a PUIG THAT 910 IS NO MORE bike was a wright off i believe it is still on the road and is now yellow
wish i had have bought it back from insurance never mind the 910s is just as good
 

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I have the Arrow thunder with DB killer, nice sound but can be a little loud when travelling through built up area. Nothing you cant control though and no loader than say an R1 with a nice carbon pipe.
 

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Discussion Starter #15
Think arrow they may I am leaning. Just gotta decide on the best colour combo to match my brute. It the matt grey/black version and I have changed the silver wheels for black and am in the process of adding CF parts so I am thinking black aluminium with a CF cap. Or full CF if the I can find a good deal on one.

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?

I went with an Arrow Thunder system, black alloy with a stainless cap.......
My '08 910R is black/dark gray
With the Arrow System you can get rid of the lopsided passenger peg mount too
A right side F4 passenger peg mount bolts right on:grin2:
 

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Discussion Starter #20
I went with an Arrow Thunder system, black alloy with a stainless cap.......

My '08 910R is black/dark gray

With the Arrow System you can get rid of the lopsided passenger peg mount too

A right side F4 passenger peg mount bolts right on:grin2:
I have no intention of every having anyone on the back so when the exhaust changes the pegs and rear set are going too.

I would get shot of them now, except here in the UK if you have a rear seat, however small you must also have pillion pegs. Even though my insurance doesn't cover pillions.


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