Manual have more better gear ratio some comes with LSD. Auto b16a have milder camshaft and lower rpm gear change. U can use manual cam or type r cam and piston with ur auto b16a for better acceleration but performance still cant compare to a stock b16a manual.
I suggest if u wanna keep auto just change to b20b/b20z block with some bolt on mod. If u want power and reliable then go for b16b or b18cr halfcut comfirm puas!
If there is anyone who can advice abt car reqistration num BGX 212 silver colour tezza previous history here would like to have another car at my family home garage.
I'm was install RSM D 1 at my car last year and the RPM reading at RSM was same with the RPM reading at my RPM meter..but, few week ago, the reading is not same...if the RPM meter read 1500 rpm, the rsm will read...