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Thread: Track legal exhausts...

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    Track legal exhausts...

    Hi there, there must be a few one here that do grip days and have to comply with noise regulations. My current exhaust is hugely loud (114dB @ 5k, with a bung in!) and I need something that will pass 105dB and not sap power (the bung is horrible). What are you guys using?

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    Guest haz's s15R's Avatar
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    3" fugitsubogiken are retard quiet and make good power...

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    Home Counties Rep LED sandwich's Avatar
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    I used a Hks silent hi power on my s14, there much quieter than that 85db range I believe. You'll want to be a fair bit lower than 105, have you tried a silenced decay?

    I currently have a cheap twin exit with a silent decat and was sub 85db at castle combe

    Sent from my HTC Desire HD A9191 using Tapatalk 2
    Quote Originally Posted by TheBigShow View Post
    Reach arounds are more my thing, I don't like the taste...

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    Whatever you get, you will want a decat silencer.

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    Guest zeppelin101's Avatar
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    Get a custom one made up? Won't cost much more than the likes of a HKS and it will do exactly what you want.

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    Guest Dave270r's Avatar
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    Pretty much anything with 2 silencers will be fine. I would also agree with running a decat silencer too.

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    Graphics Guru Davus200's Avatar
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    I've got a HKS hi power, stainless mani, 3 inch elbow/ downpipe/ decat and that made 94 DB at combe.

    Centre boxes seem to make a huge difference, or even decat silencer for an easy fit

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    Member daveyboydave's Avatar
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    I've researched this and apparently the HKS Silent Hi Power or Mongoose are the way to go. Shouldn't even need a decat silencer, apparently. Just need to pull my finger out and buy one!
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    Don't be so sure Dave, different turbo's, different boost pressures and different manifolds affect different exhausts in different ways. There is no one way.

    The de-cat silencer is definitely the easiest way to a likely sound level pass.

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    Guest Drifter's Avatar
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    I'm using an Apexi GT spec exhaust with a decat silencer. Doesn't even hit 90db on the static test

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    Home Counties Rep LED sandwich's Avatar
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    If it helps thebigshow just removed a near mint apex sensible, just could be a cheap option. There very quiet
    Quote Originally Posted by TheBigShow View Post
    Reach arounds are more my thing, I don't like the taste...

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    Member daveyboydave's Avatar
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    Has any tried the Blitz Nur Spec RX? It claims 90dB, thought obviously this can only be a rough guide.

    Linky
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    Home Counties Rep LED sandwich's Avatar
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    The centre box looks really small so I'd think that would be pretty loud.
    Quote Originally Posted by TheBigShow View Post
    Reach arounds are more my thing, I don't like the taste...

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    Guest Jamie PS13 Ks's Avatar
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    I have recently Fitted a Greddy RS Racing Sport Exhaust, Really quiet. Everything bolted up nicely without any modifications. http://greddy.com/featured/29 its the one at the bottom.

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    Quote Originally Posted by LED sandwich View Post
    If it helps thebigshow just removed a near mint apex sensible, just could be a cheap option. There very quiet
    The chap that's not posted since 2011?

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    Home Counties Rep LED sandwich's Avatar
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    Nah, he is a head mod posts all the time, ill find you a link to his profile mate

    Sent from my HTC Desire HD A9191 using Tapatalk 2
    Quote Originally Posted by TheBigShow View Post
    Reach arounds are more my thing, I don't like the taste...

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    Well, since both the turbo and the clutch blew up I've not had the time or money to see to the exhaust. Trackday on Thursday and its still way too loud. I have a bung that works to quieten it down but it also saps almost all the power out of the engine which obviously sucks balls. If I just throw the cat back in it, will this be about the same as a decat silencer? Can't possibly ruin the power output as much as that bung does.

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