I dig the JB4. It made a huge improvement from the stock acceleration of course. I managed to get not one but two traffic tickets in one week a few months back. One in the BMW and the other on a motorcycle. That's what you call a bad week. Neither were too bad at least.
I've been a little easier on the pedal since then. Luckily since I live near the outskirts of the city, there are some nice roads with prairies on each side that provide an opportunity to let it loose on occasion.
I looked for a nice 135 around KC. At the time all I could find were 335s. The few 135s I did look at were beat up. Not sure why- guessing maybe they appealed more to younger drivers?