ARP Tapered Ring Compressors are CNC machined from 6061-T6 billet tube material and feature a true radius for each different bore diameter. What’s more, they are relieved for wire O-rings on bottom. Type 3 anodizing is used for long life, and the bore size is prominently engraved in 3/4" high numbers for easy identification.

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders! This is truly the very best piston ring compressor on the market today.

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ARP Bolts

3.520" ARP Tapered Ring Compressors

Part #: 899-5520

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

3.572" ARP Tapered Ring Compressors

Part #: 899-5720

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

3.800" ARP Tapered Ring Compressors

Part #: 899-8000

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

3.830" ARP Tapered Ring Compressors

Part #: 899-8300

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

3.900" ARP Tapered Ring Compressors

Part #: 899-9000

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.000" ARP Tapered Ring Compressors

Part #: 900-0000

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.005" ARP Tapered Ring Compressors

Part #: 900-0050

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.010" ARP Tapered Ring Compressors

Part #: 900-0100

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.020" ARP Tapered Ring Compressors

Part #: 900-0200

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.030" ARP Tapered Ring Compressors

Part #: 900-0300

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.040" ARP Tapered Ring Compressors

Part #: 900-0400

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.060" ARP Tapered Ring Compressors

Part #: 900-0600

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.070" ARP Tapered Ring Compressors

Part #: 900-0700

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.080" ARP Tapered Ring Compressors

Part #: 900-0800

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.090" ARP Tapered Ring Compressors

Part #: 900-0900

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.100" ARP Tapered Ring Compressors

Part #: 900-1000

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.105" ARP Tapered Ring Compressors

Part #: 900-1050

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.110" ARP Tapered Ring Compressors

Part #: 900-1100

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.115" ARP Tapered Ring Compressors

Part #: 900-1150

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.125" ARP Tapered Ring Compressors

Part #: 900-1250

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.130" ARP Tapered Ring Compressors

Part #: 900-1300

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.135" Arp Tapered Ring Compressors

Part #: 900-1350

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.140" ARP Tapered Ring Compressors

Part #: 900-1400

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.145" ARP Tapered Ring Compressors

Part #: 900-1450

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.155" Arp Tapered Ring Compressors

Part #: 900-1550

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.170" ARP Tapered Ring Compressors

Part #: 900-1700

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.175" ARP Tapered Ring Compressors

Part #: 900-1750

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.185" ARP Tapered Ring Compressors

Part #: 900-1850

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.187" ARP Tapered Ring Compressors

Part #: 900-1870

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.220" ARP Tapered Ring Compressors

Part #: 900-2200

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.235" ARP Tapered Ring Compressors

Part #: 900-2350

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.250" ARP Tapered Ring Compressors

Part #: 900-2500

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.255" ARP Tapered Ring Compressors

Part #: 900-2550

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.260" ARP Tapered Ring Compressors

Part #: 900-2600

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.270" ARP Tapered Ring Compressors

Part #: 900-2700

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.280" ARP Tapered Ring Compressors

Part #: 900-2800

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.290" ARP Tapered Ring Compressors

Part #: 900-2900

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.310" ARP Tapered Ring Compressors

Part #: 900-3100

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.320" ARP Tapered Ring Compressors

Part #: 900-3200

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.330" ARP Tapered Ring Compressors

Part #: 900-3300

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.350" ARP Tapered Ring Compressors

Part #: 900-3500

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.360" ARP Tapered Ring Compressors

Part #: 900-3600

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.375" ARP Tapered Ring Compressors

Part #: 900-3750

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.390" ARP Tapered Ring Compressors

Part #: 900-3900

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.400" ARP Tapered Ring Compressors

Part #: 900-4000

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.440" ARP Tapered Ring Compressors

Part #: 900-4400

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.470" ARP Tapered Ring Compressors

Part #: 900-4700

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.500" ARP Tapered Ring Compressors

Part #: 900-5000

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.530" ARP Tapered Ring Compressors

Part #: 900-5300

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.560" ARP Tapered Ring Compressors

Part #: 900-5600

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.600" ARP Tapered Ring Compressors

Part #: 900-6000

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.625" ARP Tapered Ring Compressors

Part #: 900-6250

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!

4.750" ARP Tapered Ring Compressors

Part #: 900-7500

Standard stocking sizes from 3.552" to 4.750" (SAE) and 75mm to 95.5mm (metric). The true radius design is far superior to conventional “tapered” devices, and widely acclaimed by professional engine builders!