Thread:Feuerrm/@comment-27736210-20170922075619/@comment-27736210-20170924031243

Yes, the problem is usually to do with how much the rank is increased.

The PRO kits are smaller so they are more precise, but that's a trade-off for a tiny bit of lost performance.

With tunes like 0500 5055 for the Hommage and Camaro SS, you lose a little bit of acceleration and nitro compared to a tune like 3500 5050 or 0503 5050. But, the 0500 5055 does give a very nice ratio of nitro to acceleration, whereas the other tunes have slightly biased ratios, either towards nitro or towards acceleration.