Originally Posted by Arrvaxx

Because stock is stock. Tried, true, tested with tens of thousands of cars and millions upon millions in R&D. Sorry but bolting on something is one thing. You open the engine up and you could be headed for disaster.

Like I said, it would be one thing if you wanted to push the car past 650 in to the 700s but it seems like a silly thing to do for a power level that has proven to run just fine. Why not just replace the engine with something that comes stock at 650hp? Put a GT-R engine in it. I think it is safer than building.

My 2 cents.