i can lock my wheels with my GSX calipers. the only reason to get anything bigger would be for better head disappation if you auto X. the fact that you cant tap your brake pedal and lock your wheels does NOT mean you have more stopping power. stopping power is measured in the DISTANCE it takes your car to stop. if you can already lock your wheels then the weak point in your braking system is TRACTION - not the brakes.

have you even taken into consideration the braking distribution? if you can lock up your fronts long before your rears you've actually made your braking WORSE. in an ideal system you want all 4 wheels on the verge of locking up to get the maximum stopping potential. that's what ABS does. it keeps the wheels on the verge of locking. using brakes not intended for your car really fucks up your ABS system as well. it isn't made to compensate for the different calipers. additionally if you can easily lock up your wheels with minimal pedal travel you've also DECREASED the range within which the ABS system can modulate. instead of a wide range from minimal to maximum braking you now have OFF and ON. that's bad.

a lot of big brake kits make people think they've drastically improved their braking power b/c after they're installed they can lock their wheels with minimal pedal travel. all you've really done is decrease the operational range of your brake pedal. with your old brakes you could probably lock your wheels by flooring the brake pedal. now it locks when you push it say - half way down. your brake pedal now has half the operational range. your braking hasn't really improved at all. in fact with a lot of big brake kits you'll actually find an INCREASED stopping distance. but most people never compare their stopping distance - they just go by how the brake pedal feels. which tells you absolutely nothing.