anyone upgrade their pulleys and tune out there. getting the itch again and highly considering. Looks like a company in Canada Velocity AP has the longest history tuning the engine

 

I did the Velocity AP tune on two of my former L494’s (one SVR and one Supercharged Dynamic) and it was a great modification to both. I would go for it. Can’t speak for L663 but it’s probably the exact same thing. This was when I was somewhat younger and a slightly careless. 2 downsides I noticed is the exhaust smelled a little bit ... gassy... when I ran the full-on 600+hp map. Gas mileage also went to sub 10mpg in city driving. They ran like a scalded fox. I sold both well before 50K miles so could not speak to reliability long term btw. I did not do the pulley on either btw. Just the tune.

 

Just beware of any warranty work that could be voided if you do this upgrade. If you are out of your warranty, go for it. Nothing like extra power and torque!