if you are thinking of deleting your air pump and going with the march underdrive pullies dont!!!! It doesnt work. after a week of screwing with it ive realized there is no belt that will fit.dont matter how long or short it aint working. good luck

 

thats y, if you are running the serpintine setup you get a smog pump delete pulley.

 

I had those march pulleys on my first 91 TA years ago. It was the single worst part I ever put on my car or any car. This was on a 2 year old car with 20k on the odometer too. It ran terribly. Heaven forbid I had the radio headlights and the AC on, alternator power would take a nosedive. If I ran 2 of those, alternator power took a nosedive. Wipers, interior and exterior lights would visibly slow down and darken unless I was moving. VERY visibly. I had them on for maybe 2-3k miles before I replaced the engine with a 350 and took the original pulleys out of the trunk and had the shop reinstall those on the new engine. Problem solved. Underdrive pulleys... BLEH!

 

yup i agree not worth the money or headache. putting stockers back on and getting my money back.