They do perform a little better in cats! We have had a 38zr donxi also that performed about 7-8 mph better then 525's. In an eliminator cat they have seen 12-15mph gains. As far as service goes. Ilmor has Dealer classes at the factory in MI. We are a servicing dealer. The best thing is that the ilmor's are built to last along time and run harder than most bbc's and no blower. They sound like an indy car at full throttle.

do you have any photos/info on the boat yet???

http://powerboatsnw.com

So would it be safe to say twin Ilmors 625's can push a 37-39 V w/ cabin into 100+ range (obviously depending on mfg), If so now that is impressive,

WILL

the new 38 with the ilmor's would be my perfect package! 525's put it at 93mph, gotta be close to 98mph with the 625's. Just need to make some $$$$$

Viper Engines are very durable too...hear that merc?

When do we get to see some pics?

Just curious, are you ordering the boat with 496's and then yanking them yourself and putting the Ilmors in?

sorry it took so long to reply! We order the boat with 496 ho's and xr's. the lowers will need to be changed to compensate for the 600lbs of motor difference.Pictures soon!

What are you changing on the lowers to compensate for the weight loss? Adding spacers?