My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

Wiseco 3766H Pro Tru Hastings Plasma Moly Piston Ring Set 3.766 in. Bore

(Audi S4 2000-03, A4 Quattro 2005-08, A6 Quattro 2000-03, 2005-08, 4000 1979-87; GMC G2500 1979-95, K1500 1979-99, C1500 1977-99, K2500 1988-98 + 91 more models)

Manufacturer

Picture for manufacturer Wiseco Pistons

Part Number

3766H
9 reviews
Sale Price

$21.99

Estimated ship date Friday, November 20

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Wiseco 3766H is a Pro Tru Hastings replacement piston ring set designed for a 3.766-inch bore. Featuring high-tensile plasma moly-faced rings that arrive pre-gapped for convenience, this set delivers race-quality sealing performance at an accessible price point. Each set covers a single piston and is sold individually — order the quantity needed to match your engine's cylinder count.

Ring Dimensions:

  • Top Ring: 1/16 in. plasma moly faced
  • Second Ring: 1/16 in.
  • Oil Control Ring: 3/16 in.
  • Bore Size: 3.766 in.

Key Features:

  • Plasma moly ring face coating for reduced friction and improved wear resistance
  • Pre-gapped rings for simplified installation
  • Designed as OEM-replacement rings for Wiseco Pro Tru pistons
  • Race-quality construction suitable for performance and street builds
  • Sold as a single-piston set — order one per cylinder

Whether refreshing a worn engine or completing a piston swap, the Wiseco 3766H Pro Tru Hastings ring set provides a reliable, high-quality sealing solution engineered to complement Wiseco's forged piston lineup.

Products specifications

Fits

Audi S4 2000-03, A4 Quattro 2005-08, A6 Quattro 2000-03, 2005-08, 4000 1979-87; GMC G2500 1979-95, K1500 1979-99, C1500 1977-99, K2500 1988-98, Jimmy 1977-87, Savana 2500 1996-2002, Savana 1500 1996-2002, C3500 1986, C2500 1979-98 + 86 more models

2nd Ring

1/16 Cast

Bore

3.765

Bore (in)

3.766 in.

Bore (mm)

95.656mm

File Fit

No

Gapless

No

Notes

Single piston set.

Oil Ring

3/16 3-Piece Std Tension

Oil Ring Included

Yes

Oil Ring Material

Chrome plated carbon steel

Oil Ring Tension

Standard

Oil Ring Thickness

3/16 in.

Quantity

Sold as a set.

Second Ring Facing Material

Phosphate coated

Second Ring Included

Yes

Second Ring Material

Cast iron

Second Ring Thickness

1/16 in.

Size

.062-.062-.187

Top Ring

1/16 Hi-Tensile Plasma

Top Ring Facing Material

Plasma-moly

Top Ring Included

Yes

Top Ring Material

Iron

Top Ring Thickness

1/16 in.

Hassle free!!!

Wow!! I came across Autoplicity while searching for a fuel pump for my Trans-Am. Not only did they have the cheapest price for the part, but they also had extremely reasonable shipping cost. Most websites claim to have free shipping but it seemed the cost of shipping was added to the cost of their part. Then I find out my order was processed and shipped within one business day!! I'll definately be bookmarking Autoplicity's home page!! Thanks!!

Bought some wire looms for my Chevy from them. Great price, service, and shipping speed!

The item arrived fast and in good condition. There however seems to be a glitch with the scale the first time we weighed something. After we shut it off and then back on it seemed to be OK.

I ordered a Grant 1103 Steering Wheel, Order Number: 16767. Great prices, quick shipping, good customer service, an all around deal. Thank you.

The part I purchased had the lowest price I could find online anywhere.. Simple transaction and fast shipping.. Ordered on a Monday and delivered by Friday..

Great Prices and Very Fast Shipping. Will order again in the future. Customer Service was great when I called about a question with my order.

Great prices and fast delivery.

best prices around !! Shipping was FAST !

Share icon
Return Policy
Returns are easy at THMotorsports

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy