Evora NA engine tune and 4.0

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Hi
I was wondering if anybody has applied any straightforward tweaks to the 3.5 NA PU to get the output up?
Also looking to try and understand the 4.0 NA used in GT4 race cars.Is this just a version of the 4.0 utility vehicle engine is something more exotic?
Cheers for any help.

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Thanks, that’s very helpful

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blueg33 said:

When I looked at the cost of upgrading my n/a it looked like the most power I would get was around 320-330bhp.

It was much cheaper to upgrade to an S and get 350bhp.

S does seem very simple way to get the power for a road car. I am looking at a race application and want to understand the potential upgrade path for standard N/A engine as I want the durability/simplicity.