hi Marti
Thanks for the detailed reply, maybe i'll get a second hand 2.5 sump that way i'll get all the other bits needed.
I have just bought my scoobie and the last owner said he got a tune (yes I know theres good n bad) but I thought headers first then retune.
From a mechanical point of view I can't get me head around 1 pipe shorter than the other taking much needed power.
Is there any improvement to fitting UEL to a 300HP EJ20

Taaz