RX8 has to be mounted lengthwise... I would have preferred to be able to mount it sideways.... but other than that, It's good. I run the RX8 and the SC4x 5.5.

I really have to say I'm floored by this combo in this truck... I started of with 12/62 and the motor was barely hitting 110. Moved to 14/62 and was at 125-135 after a 5 minute heat..... moved to 16/62 today.... temps outside were 77 and humid... still couldn't push the motor past 145 in all 4 runs. This is all the top end I will need on a vary large 1/8th track with several long straights, plus it still has enough bottom end punch to get me out of trouble if I misjudge part of the rythem section....just gotta roll one bump and I'm right back in it....