As title really, will be a bit into the future but will no doubt start chasing for more power out the V6 but unfortunately not found much info regarding the v6 in the signum and how it differs in tunability compared to its vectra vxr brethren, not as much info out there like there is for the z20let/leh and it's derivatives which also have a whole catalogue of off the shelf parts available.

Know some parts will fit like the down pipes but apart from that am at a loss, and not sure where to even look for parts like upgraded pipes( stainless hard pipes for example) and exhausts( will vxr estate systems fit?)

Basically just looking at what's possible and what's needed, did search for info but drew a blank.

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