Originally Posted by
wizby
Grinder you really have us wondering what the difference is.
The difference in the tuned, and modified are as follows.
The Tuned engine has a lightly modified crankshaft. No other modifications.
The Modified engine has a highly modified crankshaft, modified case, modified piston, modified cylinder, modified turbo head.
All of the M353R engines have Tuned quality internals similar to what the factory team drivers get. All of the internals are matched to ensure that you get perfectly round piston/liners, ceramic bearings, crankshafts, etc...
