C7 Corvette LT4 10-Rib Conversion

This 10-rib conversion allows the complete conversion to a 10-rib system on the C7 Corvette LT4 blower drive and includes everything needed except the upper pulley.

Please choose your rib offset, and note that some applications may interfere on the blower with +/-1 unless clearanced (like stock LT4) while extremely large lowers can interfere with the subframe on +2. Click here to order the correct Magnuson 2650 upper.

You will need to specify the size of the lower pulley you'd like with the system, and the max diameter to clear the lower idler is 9.84"/250mm. Also note larger +/- 1 lowers will require this clearanced serpentine pulley (unless you modify the stock one).

Included in this conversion:

• GM LT5 tensioner (~20% more tension than stock LT4)
• DSX tensioner bracket w/ smooth idler
• GM LT5 90mm smooth idlers
• DSX 89mm (OEM diameter) ribbed idler for tensioner bracket
• DSX 70mm (OEM diameter) ribbed idler for water pump
• DSX Anysize 10-rib lower for ATI 917315 damper

DSX Tuning shipping & returns

• Shipping: in-stock orders placed before 3pm CST usually ship the same day. Back-ordered items ship as soon as they are available.
• Returns: unopened parts within 30 days of receipt, with a 20% restocking fee once the order has shipped. Original shipping is not refunded and the customer pays return shipping. "Unopened" means the original packaging is undisturbed and the part was never installed.
• Cancellations: orders not yet shipped (back-orders included) carry a 5% cancellation fee.
• Not returnable: custom-made or customized items.
• Warranty: DSX-made parts are covered against manufacturing and assembly defects for life for the original buyer. Installation damage, modified parts, cut or rubbed harnesses and fuel lines, and water damage to electronics are not covered.

To start a return or ask a question, contact us with your order number.