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iTrader: (1)

The impreza sti blobeye I have just now is due to get the following mods done but wondering if there is any big difference to decat or sports cat other than mot.

I currently have an md321t to be fitted with other mods and a 3" blitz spec r catback exhaust to fit but not sure what to do regarding down pipe and headers and uppipe am not chasing numbers just looking for a good set up if anyone can point me in the right direction 😁

ZANY

The blitz will be very very loud and really do your head in even at normal and even worse at speeds over 50mph so 5he sports cat might be a good idea an£ save you all the messing especially if you get a funny policeman as these cars have a loud presence even without the blitz exhaust.

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iTrader: (1)

Am no to fussed about how loud it is as AVE had loads of Impreza just not with the md321t so just looking at weather or not to just decat it or run a sports cat if there is a massive power difference

bighead

iTrader: (1)

Run a sport cat as it will pass M.O.T, I had the the same turbo and Blitz N spec exhaust with decat pipe and it did my head in ..and the Neighbours were not happy when I leave for work at at 7 am in the morning !

Vxr2010

in real term performance there is nothing in it , i had two fsti one with standard cat one with a sports nothing in it off the line , it’s around 20 bhp more between cars , sports cat a bit more turbo noise , de cat can be big hassle mot time , plus illegal if you get stopped , any change in down pipe cat will need a remap

jaygsi

iTrader: (46)

100% sports cat. Makes the car feel a lot more free flowing. On my classic it improved it massively, but I did swap to 3" bore at same time.

Flat4x4-again

iTrader: (1)

Same here - well worth it. Mine is a Cobra.

I have PPP fitted - I get pops and bangs on the over-run but it runs really well and I don't fancy swapping Prodrive for a remapped Ecutek as that caused a new short engine a few years back.

playtime

iTrader: (1)

Thanks guys it's a full 3 " system am putting on just wasn't sure to decat or sports cat with the md321t

Turbovin

iTrader: (2)

I use the stock downpipe for MOT, the car feels very hesitant to build boost compared to decat or the 100 cell cat I'm using now. MD321T+