HKS Fine Tune V-Belt RB25DET

Performance

EPDM (Ethylene Propylene Diene Monomer) Rubber was selected because of:

• Better durability and performance in hotter or colder conditions with improved friction tolerance.
• Much lighter than previous version of belt.
• Short fiber mixture in rib rubber improves the performance over previous version.

Performance Comparison with Stock Belt

Button bolts were installed to 24996-AK012 (5PK875) and 24996-AK013 (5PK885) during the test.

When using these 2 belts above, a stock V belt may come in contact with a stock alternator adjustment bolt due to an insufficient clearance between them. 
Using the provided button bolts can prevent abrasion of the V belt.

HKS put all their know-how knowledge into engine parts from the data they have acquired from the drag race, round race, time attack and drift race. The HKS team provide Engine tuning ranging from Camshafts, Pulleys, Pistons and Rods to Timing Belts, Pump Upgrades and even Head Gaskets. The concept behind HKS engine products was to produce something the customers would truly be happy with.