I emailed Canuck a few weeks ago and said they still had the GXP springs in stock, I did ask him about putting them on my CompG and he said that the reason they are 2.5'' drop is because of the weight difference of the engine in the GXP vs the GTP. he said if you were to put the GXP springs in the GTP you would be closer to the 1.7'' drop not the 2.5'' thats advertised for the GXP