a9p are great for cars with big cams. since it is for auto cars, it will hold the rpm's higher for a couple of seconds when you come to a stop. this way the car doesnt die when you push in the clutch like most big cammed cars.
I Had A A9l And It Got Screwed And I Put An A9p In My Car And It Runs Great. I Have A Standard Btw. I Have Heard Several Bad Things About The A9m. It All Depends On Who You Talk To. I Have Had People Tell Me I Am Crazy For Running An A9p In My Standard But The The Guys Who Helped Memhave My Car Running Great With It. No Chip Either. I Am Running A 331 With Lots Of Mods Heads Intake Ported And All And A B Cam, Lol... Poor Choice Of Cams. Off The Subject Sorry.