2 1/4 would be almost to close, and i dont think they make 2.5 in 2.52 pitch, so you would already have to change drivers. dont know, other than you dont wanna get to close and have your track bumping into your coolers, i dont think it would be a 2.5 for very long even if it did squeze in, install would be a nightmare to on something that tigh, getting the drivers in with 2 inch track takes some time and knowhow already.