Sports cat + standard exaust question?

[sandwich1987]

Hi I'm currently getting my car custom will having a xspower manifold downpipe sports cat and the rest of the exhaust standard affect the level of power acheivable significantly over a decat and milltek??
current mods are hybrid stage 4 turbo, xspower Manu downpipe and sports cat, welly cooler, forged rods, b5 tip, and 007p an a few other small bits. I was hoping to achieve around 300 but not chasing it just want to know if the current setup will hinder this goal?

Thanks

 

[<tuffty/>]

The OEM back box is quite restrictive as power rises... I did run mine for a very short while when I first went big turbo and the EGT's were insanely high.... (was over 350hp at the time)

Keep an eye EGT's during mapping if you haven't got the budget for a Miltek or a custom cat back... sports cat should be fine, its the back box thats the next restriction in the chain....

<tuffty/>

 

[sandwich1987]

I'm hoping to get a milltek when it comes back, i had booked the mapping already when I spotted a potential but lol it's just they've phoned up and said the sports cat and standard oem exhaust may reduce the power I'll get, wish I had initially fitted a decat it was just to avoid mot issues