zayd

iTrader: (1)

I'm looking at putting a few basic mods on my 2005 STI.

Panel Filter
High Flow Fuel Pump

So is it really necessary to put in a Sports CAT to achieve around 300 bhp at remap time. Is it a must to have this fitted in order for the turbo to spool up quicker.

Its just that I don't want any MOT emissions failures, especially with the stricter testing regime starting next year.

JonMc

iTrader: (51)

Next years regime is no stricter in terms of emissions, they are just now physically checking that if a CAT was fitted as OE then one is still fitted.

For an STI a remap alone will likely see more than your target 300bhp, but to maximise the benefits a free-flowing exhaust including sports CAT will lead to a further improvement.

Berks-Jack

iTrader: (10)

That's an interesting point John. What would happen in the case of the ppp being added to a car?

And I assume all sportscats will have to be marked not for road use or similar?

L.J.F

iTrader: (31)

You still pass mot with a sportscat fitted.

JonMc

iTrader: (51)

It doesn't require the OE CAT to still be in place, just that A CAT is still in place...

daz1968

iTrader: (13)

Depends how strict they are as the statement a catalytic converter missing where one was fitted standard could cause issues with 2nd cat delete pipe, prodrive pipe still looks like a cat so most garages won't know difference though. Only time will tell how much effect the new regs will cause, but hopefully common sense will prevail

JonMc

iTrader: (51)

And also depends upon whether the garage knows that 2 were fitted were there is now only one

JDM_Stig

iTrader: (3)

they will know if a cat is physically fitted at mot time by whats coming out the back,
also the prodrive 2nd cat delete is bolted in a strange way to the downpipe so you can tell by looking if its the OE one or one that has been fitted later.

zayd

iTrader: (1)

Correct me if I'm wrong but is this the Prodrive set up. They start with a Sports Cat downpipe mating on to a decat centre pipe and finally have a sports muffler at the end.

Most aftermarket sports cat's have the downpipe and centre decat as one piece.