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

ARP 901-8900 Piston Ring Compressor Tool

Part of: ARP Piston Ring Compressor Tool

Other options in this family: ARP 901-9200 ARP 900-3900 ARP 900-1400 ARP 900-4700 ARP 901-9300

Manufacturer

Picture for manufacturer ARP

Part Number

901-8900
12 reviews
Sale Price

$71.83

In Stock (10+)

delivery box

Usually delivered within 2 days

free shipping

FREE SHIPPING

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 ARP 901-8900 is a precision-engineered piston ring compressor designed for professional engine assembly. CNC-machined from 6061-T6 billet aluminum tube material, this tool features a true radius bore that matches the exact cylinder diameter, ensuring smooth piston installation without ring damage.

Key Features:

  • CNC-machined from 6061-T6 billet aluminum for exceptional strength and durability
  • True radius bore design provides superior performance compared to conventional tapered compressors
  • Bottom relief machined to accommodate wire-type O-rings
  • Type 3 hard anodized finish for corrosion resistance and extended tool life
  • Bore size prominently engraved in 3/4-inch high numbers for quick identification
  • Precision fit eliminates piston rocking during installation

This ring compressor represents the professional-grade standard preferred by engine builders worldwide. The true radius design ensures even compression around the entire ring pack, preventing ring breakage and reducing installation time. Available in various bore sizes ranging from 3.552 to 4.750 inches (SAE) and 75mm to 95.5mm (metric).

Products specifications

Maximum Diameter (mm)

89.0mm

Minimum Diameter (mm)

89.0mm

Piston Ring Compressor Finish

Black anodized

Piston Ring Compressor Material

Aluminum

Quantity

Sold individually.

Size

89.00mm

The items I ordered came in prior to the expected date and were correct

Order was easy!

Shipping came when it said it would now I just have to install this new handle

I didn't see an estimated ship/arrival time

Fast service

Item arrived as scheduled. I have installed and is working just as the broken one had. Thank you

Great Seller!

The item purchased was found to be the best price on the market. Your customer service rechecked the items photo to the model # listed as the on screen photo was not the representative photo match. The rep was able to describe the correct unit photo for purchase. The correct Horizontal Propane Tank was received and filled w/ no issues. The only problem was the actual freight handling, as the tank handle was delivered damaged/ bent and its box top broken inward. Instead of returning the item of need, I was able to rebend the handle back into its original shape. The handle weld was not broken.

I spent hrs looking and researching parts and prices... Hands down Autoplicity<br> has it and at the best price you'll find!!

very excellent oil the only oil that has been in my harley since it was new and it a 95 very fast shipper ordered it 19 feb and got it 22 feb

The website is very user friendly and the the tires I ordered were probably the lowest price I've seen online. It was easy to find what I was looking for and the shipping cost for a set of tires is phenomenal.

Autoplicity has great prices and products are shipped promptly. My trailer hitch arrived the day after it was shipped. Autoplicity sent a tracking number. I would order again.

Share icon
Return Policy
Returns are easy at Autoplicity

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