I've just started using Pre-MIX in my 13B-MSP. Smoother feel almost immediate after the 1st fill-up. I'm putting in bout 200ml (believe it's a US quart) for every 50 litre tank.
Like lennon said RM 60 for a 1 litre bottle to last 5 fill-ups.
i use nismo exhaust now,,but sound no good!!i hear somebody say amuse very good,is tat very noisy...i 1 wen i drive slow will silent but wen hispeed will crazy??hope got some suggest