Originally Posted by Rsickles

Until I blow my VZ in my other car and replace the internals with Arrow ones, I'm speaking as if Arrow is true mimic of the VZ.

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If it were my choice, the 2050 is great on bottom end and really smooth, but average mileage. 2060 gets better mileage and smoother top end. Club racing I'd take 2050 all day long.

RE12 is similar to 9901, but not truly identical. Not sure why people like 9901, my guess is it makes the engine powerband more like those 'other' engines they've had. Of course if you were budgeting, JP3 has tons of all around performance but gets a bad wrap because of the name on the pipe.

There isn't really "one" pipe per se, just a pipe that matches your driving style.