Steve_V6

hi, i just bought a 99 st24 today, it has a cat back 3" s/s zorst, but seems very quiet, at 3k rev's and below it sounds nice but after that when you put your foot down can hardley hear it,
what can i do to make it sound nice but not like a chav mobile lol

Thanks Steve

RichieST

iTrader: (2)

Stick an induction kit on it or drill the airbox!

Steve_V6

cut the frunt off the air box cos i never had a drill sounds loads better now

Fiddy

Ive Got 4" Blueflame StainlessCat Back On Mine, Sunds Just Rite, Borbles Away Nicely, But Its Not To Loud, Which I Quite Like. Decat It, It Will Change The Exhaust Note, And Free Up Some Horses. Mine Sounds/Goes A Lot Better Since i Did Mine

Steve_V6

can you buy a de-car down pipe or do you have to get a one made ? haw expencive are they ?

Fiddy

Sell Stainless Decats On Ebay Mate, About £100. Easy To Fit Aswel, Its Only 4 Bolts, Or 5, Depending Wether It Has A Two Or Three Bolt Flange At The Front, Mine Was Fitted In 20 Minutes, And That Was On Axle Stands With My Fat Arse Rolling Round On The Floor Outside My House LOL. Should Still Pass The MOT Emissions Test Aswel, As They Have Two Precats On The Manifolds.

Steve_V6

thanks for that m8, al have a look at them

Chaz888

Its the pre-cats that do it but saying that I have SS manafolds and a blue flame cat back and still very serdate sound try an get an st200 air box they sound very good come to think of it might sell mine if your after one

RichieST

iTrader: (2)

What's with all the caps fiddy?

Drilling the airbox does make it sound good, as long as you drilled the bottom half of the box and not the top!

Steve_V6

a never had a drill so i have cut the front of the bottom part of the box off lol, sounds loads better




was intrested in the downpipe for the extra powed, what power gains can you expect from a de-cat ?

RichieST

iTrader: (2)

de-cat should give you around 5-10bhp depending on the car

Steve_V6

100 quid for the down pipe and 5-10bhp that work's out 10-20 quid per 1bhp haha


cat you tell the diffrence with so little bhp ?

Fiddy

Its My New Thing Rich, Stop Hating

boaby

5-10 is quite a lot for this engine, ive got toyosport headers and y-pipe and that made a bit of a difference, cost more than £100 though