Give your C5 or Z06 Corvette unbelievable acceleration with our exclusive 3.73, 3.90 and 4.11 Differentials. If your C5 currently has a 3.15 gear, you can expect almost a full second improvement in 1/4 mile ET's. C5's with a 3.42 gear can expect a .3-.4 tenth improvement in the 1/4 mile elapsed time. This is, no doubt the least expensive way to make your C5 run, as if it had major engine modifications, without spending major dollars. These units are professionally rebuilt using our New exclusive Ring and Pinion set. This assembly comes with a One Year Limited Warranty which covers ring and pinion set, seals and bearings. Parts are sold as an exchange.
• "NEW" - All our gears are now Cryogenically treated. • *Extreme duty package recommended for cars producing over 450HP. • Cores must be returned within two weeks from date of receipt. Refundable $1800.00 Core deposit. Core charge will only be refunded Warranty does not apply to race applications. Not recommended for cars producing over 450HP. • 1 Year Warranty A little information about Cryogenic Treatments: Cryogenic hardening is a cryogenic heat treating process where the material is cooled to approximately −185 °C (−301 °F), usually using liquid nitrogen. It can have a profound effect on the mechanical properties of certain steels, provided their composition and prior heat treatment are such that they retain some austenite at room temperature. It is designed to increase the amount of martensite in the steel's crystal structure, increasing its strength and hardness, sometimes at the cost of toughness. Presently this treatment is being practiced over tool steels, high-carbon, and high-chromium steels to obtain excellent wear resistance. Recent research shows that there is precipitation of fine carbides (eta carbides) in the matrix during this treatment which imparts very high wear resistance to the steels.
All items will be shipped via Standard Ground Service unless otherwise requested. Many carriers require a physical street address; they will not deliver to a P.O. Box. All freight charges are the customer’s responsibility. Please note that all freight charges quoted are for Standard Ground Service on the price list. We will be happy to quote you charges for other shipping methods. All Items shipped on Friday Next Day Air will be delivered on the following Monday. If you would like Saturday delivery for items shipped on Friday only, please contact us for shipping arrangements. If an item is custom order or on back order, it will ship with the selected shipping service as soon as it is ready. To check if an item is in stock and ready to ship, please call our parts department.
Customers may return new, unused items within 90 days of delivery for a full refund to the original payment method. West Coast Corvette is not responsible for return shipping costs unless it was our error. Please refer to the tables below for return restrictions.
Full refund to original payment method
After 90 Days
10% Restocking fee and store credit
Oversize fees are noted on the product listing. Including but not limited to, wheels, spoilers, splitters, side skirts, any items with initial oversize shipping fees
10% Restocking fee
MGP Calipers, Lloyd mats, Racemesh grills, Speed Lingerie, American Car Craft, Oracle Lighting
Not eligible for return
Used parts, clearance items and parts that have been installed.