Daily / Track RX8

Hi guys,

A year ago I purchased a 5 speed manual 2006 RX8.
Struggled to find a 6 Speed manual at the time.
Really loving the car, the handling is fantastic, love the rotary sound.

The car is daily driver, warmed up before every drive.
Bit costly on fuel but I don't mind as I love driving my RX8.

I've been to the track and want to get a lot more track time going forward.
I've done a lot of reading about performance upgrades, cooling, suspension etc.

My question is more to do with the 5 vs 6 speed.
Before I start throwing money at the car, I would want to know if it will be worth it or if I should rather invest in a 6 speed manual.

The car does feel like it lacks some power as the 5 speed manual has the 4 port engine and not the 6 port like the 6 speed manual.
It a 40kw (54hp) difference between the 4 and 6 port engines.
Quite a substantial amount to try and make up with an engine that isn't very tunable unless you start looking at forced induction.

Thanks in advance for any feedback.

Cheers :D:

Daily / Track RX8