Hi sorry if this has been ask before. I've got a 93 325 E36 and would like more power from it, but at the same time not limit the engine to a inch if it's life. i got the car mainly for track days but do some times use the car on the road. I've heard that the manifold change and chip would help but don't want to waste my money as i have seen people say they spend hundreds on mods and it don't really work and can lose power. Also i've heard you can take the brakes of a 530 to uprate them, is this true. Thanks