Amazon offers the 3M Fuel System Tune-Up Kit, model no. 08963, for $1.24 with free shipping via the directions below. That's $10 our mention from a week ago and the lowest total price we've seen. (It's a current low by $24.) It includes intake system cleaner, throttle plate and carb cleaner, fuel system cleaner, and an instructional DVD. Rebate ends July 31. To get this deal:
  1. View the 3M Fuel System Tune-Up Kit for $24.99
  2. clip the $10 off coupon under the price to cut it to $14.99
  3. add it to your cart via Subscribe & Save to drop it to $11.24 with free shipping
  4. redeem this $10 mail-in rebate for a final net price of $1.24

Be sure to cancel Subscribe & Save after your order arrives (it's easy to cancel) or you'll be billed for subsequent shipments.