fat_boy

iTrader: (1)

Hi all i have a 97 sti jdm which i have recently fitted a blitz nur spec r cat back 3" system but was thinking of getting a de cat downpipe
i know there not road legal but is there any1 on here running a fully de catted system on the road and have you had any problems?
also were can i get one from thats cheap but good? lol
many thanks in advance
Ben

greatgonzo

iTrader: (1)

Hi mate there's loads of use on here running de cat on the roads, I have a hawkeye and a full de cat I needed a remap so the car can run safely (and fast)

fat_boy

iTrader: (1)

so i will need a remap to fit the down pipe
hope not as mies a v3 which means i will have to buy a new ecu wont i?

greatgonzo

iTrader: (1)

Sorry mate not to clued up on classics Im sure you could fit it no problem and the car would run ok, but I thought that most mods like decats would require a remap but I could be wrong

fat_boy

iTrader: (1)

no worries mate hopefully some1 on here will point me in the right direction
but cheers for the help buddy

greatgonzo

iTrader: (1)

Check the for sale section there's always down pipes going

tanyatriangles

iTrader: (2)

Don't do it unless you can get it through an MoT, which it won't pass without a cat.

Alternatively, keep the cat, and swap over at the right time.........

fat_boy

iTrader: (1)

no prob with the mot i can get over that lol
any1 else??

fat_boy

iTrader: (1)

any1 do i need a re map if i fit a downpipe decat or will it be ok 4 abit while i save my *** off lol

Roger.m.

i have a fully decatted turbo back 3inch its been on for over three years. ive had the car for six months and had no problems what so ever and as far as i know it hasnt been remapped its a 97 uk turbo so would need a different ecu.i need to get it dynoed to see what power it is cos its fast. the exhaust gives a big increase in power when de catted.

sti69

iTrader: (1)

Hi mate, My V4 JDM STi is running 3" fully de-catted system with only a rear silencer and its hasnt been remapped and its running spot on. So go for it mate and also it makes the boxer engine sound like it should

Roger.m.

you might need to get a check engine light eliminator fitted in the exhaust to stop the light coming on.

Hysteria1983

I have a H&S 3 ''system with a decat downpipe, and I have never had any problems.

Obviously it will run better with a remap, but the decat will help the turbo to spool up faster, and it sounds better!

Sometimes a decat can cause boost spikes, especially if you like to use your right foot alot!

Roger.m.

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here mine. note the smaller pipe next to the main pipe. this is to stop gases hitting the plate and going back into the turbo.

Roger.m.

also your heatshield probably wont go back on without a bit of modifying.

Hysteria1983

Yes, the heatshield will probably need a bit of tweeking, but it will go back on.

fat_boy

iTrader: (1)

are the ones for £100 off ebay any good or not
what is a desent one without paying a fortune???