The 99 model year has a diferent drive belt configuration and I've always had to order the belts from saleen since it is an odd size at 116.5 inches. I went to order a new one and they have jacked the price up from 30 something to $99 plus shipping.
Anyway I refuse to order another belt from them so I figured out that if you replace the upper idler pulley with a 74mm pulley you can get the belt size down to 115 inches which is available in most parts stores. You lose a little belt wrap around the supercharger pulley but you can always get the mosaleen idler to help with that. Now I do have the chicane pulley so it might be a little tight with the stock pulley.
Just thought I'd pass that along.
Anyway I refuse to order another belt from them so I figured out that if you replace the upper idler pulley with a 74mm pulley you can get the belt size down to 115 inches which is available in most parts stores. You lose a little belt wrap around the supercharger pulley but you can always get the mosaleen idler to help with that. Now I do have the chicane pulley so it might be a little tight with the stock pulley.
Just thought I'd pass that along.