2005 holden commodore Vz need help on peformence

[vz23kq]

i have had my 2.5 xforce exhust stright from the Cat installed a month back, My car HAS dropped power on low revs but on high revs it gains Shitloads of power. i need to no from anyone who has done this to there car,
what else should i be looking at buying?
such as Hurrican extractors, and 2.5 CAT CONVERTER ??
would these 2 things help gain that power back?

 

[doms1]

i have had my 2.5 xforce exhust stright from the Cat installed a month back, My car HAS dropped power on low revs but on high revs it gains Shitloads of power. i need to no from anyone who has done this to there car,
what else should i be looking at buying?
such as Hurrican extractors, and 2.5 CAT CONVERTER ??
would these 2 things help gain that power back?

A new more performance oriented car

 

[wikky]

There's a sticky at the top of the VZ section about mods for the VZ with everything you need to know.

 

[lockie4802]

I have and vz 05 one tonner and losing power now and then on acceleration. Some days you can jump in and start it up and go 100m down the road with power then will lose it for a day or two. Computer diagnostics tested ok. If i accelarate slowly out it helps. At high revs accelerating it just doesnt have that same take off anymore. Also has a new clutch kit.
Have replaced plugs and throttle body. Any more suggestions???? Thankyou