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Wiseco RCS40300 Tapered Piston Ring Compressor Sleeve 4.030 in. Bore

Part of: Wiseco Pistons Tapered Ring Compressor Sleeve

Other options in this family: Wiseco Pistons RCS07000 Wiseco Pistons RCS07700 Wiseco Pistons RCS09600 Wiseco Pistons RCS09250 Wiseco Pistons RCS09400

Manufacturer

Picture for manufacturer Wiseco Pistons

Part Number

RCS40300
17 reviews
Sale Price

$35.99

Estimated ship date Saturday, November 28

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Product Details

The Wiseco RCS40300 is a precision-machined tapered piston ring compressor sleeve designed for a 4.030-inch (102.36mm) bore. Unlike universal adjustable ring compressors, this is a dedicated, bore-specific sleeve engineered to make piston installation fast, accurate, and damage-free during high-performance engine builds.

Key Features:

  • Forged aluminum construction — machined from Wiseco's own sleeve forgings, delivering the same material toughness as their performance pistons
  • Hard anodized and PTFE (Teflon) coated — reduces friction and guards against wear, protecting ring coatings and break-in lubes during installation
  • Precision tapered bore — smooth radius tapers down to the exact 4.030 in. bore dimension, compressing piston rings smoothly and evenly as the piston is guided into the cylinder
  • Eliminates bent and broken rings — especially effective when working with thin, high-performance oil rings that are notoriously difficult to install with universal tools
  • Made in the USA — forged and machined in-house at Wiseco's domestic facility
  • Bore size: 4.030 in. / 102.36mm
  • Finish: Black anodized
  • Sold individually

Wiseco's ring compressor sleeves are an essential tool for any serious engine builder. The bore-specific taper keeps rings perfectly square to the cylinder wall during insertion, reducing the risk of a ring popping out between the sleeve and deck surface. Available in a wide range of bore sizes to match standard and over-bored applications.

Products specifications

Bore

4.030"

Tapered

Yes

Prop 65

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Adjustable

No

Industry

Automotive

Engine Type

ICE

Out of Stock Message

Estimated Shipped Date 3-4 Weeks

Product Type

Engine Piston Ring Compressor

Hard Anodized

Yes

Teflon Coated

Yes

Title

Ring Compressor Sleeve - 4.030

Title - Web

Ring Compressor Sleeve - 4.030 in.

Simple, easy and fast. The order got here sooner than expected. It was the least expensive kit a d the same as the others.

Thanks for the amazing service! Repeat customer here!

I request no offers via e-mail or phone and would like my info to not be shared

Great work

Great price

Good price and quick delivery

Fast and easy

No comments

Great prices on parts.

These people are just awesome! I got my Thule Bike Rack for a fraction of the cost compared to everywhere else. Shipping was very fast and cheap but when I received it there were a couple of missing hardware parts. Thule wanted to make me ship the whole thing back. Rob Fratu of Autoplicity took control of the situation and got Thule to ship me the missing parts and some extras, all within a couple of days. I cant remember a better experience with a retailer.

quick and easy

Wow, first time I ordered and they hit a homerun with me!! Shipped same day I ordered AND was the cheapest option I had including shipping. I'll be back. Thanks for the great service!!

My order for a "Thule" bike rack went thru like silk. Was received (1) day early. Would recommend "Autoplicity" to anyone. Best buy I could find on line.<br><br>Customer in Kokomo, IN

Shipped and received in quick fashion. Item arrived as expected. Would definitely buy from again!

Price was unbeatable and the shipping was fast. Top notch reseller.

Lowest price I could find on the internet. They do what they say. Shipped promptly with UPS tracking no. sent by email. Would recommend.<br>

I loved the low prices and shipping is fast it only took about 4 days to get my parts. The thing that really makes me want to buy again is the customer service, I actually got to talk to a real person when I called!

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