[XRQTOR]

Originally Posted by Bob MG

Hamman outsources it's software and is generic
ESS custom develops tunes in house and specifically developed the cat less header tune.

http://www.esstuning.com/categories/...52dSeries/X6M/

Hammann is just tune and exhaust also

Thanks for the info mate, i take it the quoted power gains are on a stock car with no exhaust mods. 45hp & 110lbs is great but some what short of the 670hp of the Hamann kit, is the rest picked up through the exhaust