Probably because he has the rear 02's turned off because the car has headers. Other modifications might have been made in conjunction with the mods. Ask the previous owner. Not sure how bright he is though.

-'96 SE MTX 3L -'98 SVT 1,173 of 6,535 -'05 Mazda 6s, loaded, g/f's ride -Need a 96-00 manual on CD? PM or email me