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Engine Parts->
  |_ Camshaft Thrust Buttons->
  |_ Camshafts->
  |_ Cylinder Heads->
  |_ Dodge SRT4 Turbo->
  |_ Engine Components->
    |_ Connecting Rods->
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    |_ Crankshafts->
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    |_ Engine Bearings->
    |_ Engine Block Main Caps->
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    |_ Mopar B/RB Windage Tray
    |_ Oil Pans->
    |_ Oil Pumps->
    |_ Piston Rings->
      |_ Akerly & Childs
      |_ Childs & Albert Piston Rings
      |_ Eagle Piston Rings
      |_ GM Performance Piston Rings
      |_ JE Pro Seal Piston Rings
      |_ Keith Black Piston Rings
      |_ Mahle Piston Rings
      |_ Perfect Circle Piston Rings
      |_ Ross Piston Rings
      |_ Speed Pro Piston Rings
      |_ SRP Piston Rings
      |_ Total Seal Piston Rings
      |_ Wiseco Piston Rings
    |_ Pistons->
    |_ Pushrods->
    |_ Timing Chain sets->
  |_ Engine Girdles->
  |_ HEMI 5.7L, 6.1L, 6.4L Components->
  |_ Intake Manifolds->
Engines->
Exhaust Components->
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Fuel Injection Systems
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Gear Venders Overdrive Units
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Lift Kits->
Lowering Kits->
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Race Car Bodies->
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Rear End->
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Striker Viper heads Return
SuperChargers->
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Tech Help
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Viper
Water Pumps->
Wheels->
Wideband Monitoring Systems->
Wiring harness and Accessories->

Customers

Brian R.

John!! Got my Viper back together, dyno tuned. Super happy with the results of your work!! Gained 112 RWHP and 107RWTQ!!!!! More at the crank. Sounds...
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Toby W.

John, Thanks again so much. You're truly awesome.
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Bruce P.

Bruce P.

You’ve got a big fan in me. Oh yeah, the car is awesome. Runs like a raped ape. So thanks a lot !
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Robert S.

Robert S.

426 Hemi Cuda
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Craig W.

Craig W.

Thanks John, So far 8 races and 8 top Five!!
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Phil S.

Phil S.

Great job creating this Dakota R/T Ground Affects Kit. Phil
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Buyer

Super guy to deal with! GREAT SERVICE!! GREAT PRICE!!
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Robert S.

Robert S.

Great parts and service! Robert
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Benny C.

Benny C.

Thanks for the Great Mopar Service !
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Matt C.

Thanks again John, someone who’s willing to help and not just sell parts. So, looks like you’ll be listed on my referrals. Keep in touch. Thanks...
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Colton H.

Colton H.

"Johns the man, bought a 410 package from him years ago after I got back from overseas. The caveat I gave John was that it had to pass Californian...
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Scot C.

Scot C.

Thanks for everything John. We will be doing business again. At Nationals 6.38 on a 6.54 dial in.
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David A.

David A.

Thanks for everything, David
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Kyle M.

Kyle M.

John, I am very pleased with the brake conversion. The kit was very easy to install and I didn't have any problems and look very good as...
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Carl E.

Carl E.

Dodge SRT-10 Viper
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Dan F.

Dan F.

John, The truck is not done but i drive it daily and it runs good now. Eventually id like to do the rear brakes! Thanks
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Barbara H.

John, Thanks again for making Colton's dream come true! The truck is in the body shop, the cowl hood arrived and the new 408 engine you built is...
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Darren B.

Darren B.

John,Racing flat out on the 440/533 engine over 1 season & 65 passes at 8.97@150mph 1.27 60' getting great results!!Engine is GREAT!Thanks mate!
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Pete L.

Pete L.

Mopar RB 440 Aluminum block with a Procharger. Makes 1600 HP!!
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Clay B.

Clay B.

Thanks for everything !
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Jim W.

Jim W.

Thanks for the fast parts service and Great cylinder head porting! Jim
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Henry T.

Henry T.

HEY! Everything is installed and car runs AWESOME! Thanks for everything, Thanks again. Henry 2000 Dodge Viper R/T 10
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Bruce P.

Bruce P.

John, you have been so prompt and helpful. Take care my friend and thanks again. I'll be back. Bruce
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Mitch C.

Awesome work! Glad I went with you guys! Anyone I know of that wants to build I'll send your way! Thanks John! Your the man!! Mitch
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Taylor M.

Taylor M.

Thanks a lot John !
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Perfect Circle Piston Rings

Perfect Circle® performance rings are the most extensive and technically advanced high performance rings in the industry. Driven by today's requirements for reduced oil consumption, lower friction, higher power output, and longer life, Perfect Circle is out front with the latest technology. Off the shelf sets, individual rings and custom finished rings are all available from Perfect Circle.

Tapered Hook Groove (THG)
 The second compression ring on a piston contributes significantly to engine performance, particularly in racing applications. Unfortunately engine builders often overlook the importance of this ring when selecting a compression ring. Reverse torsional twist second rings have been the industry standard for many years, but offer only a limited performance advantage. If back pressure buildup from combustion gases leaking past the top ring is not controlled, it can cause the top ring to float, breaking the combustion seal and reducing power.

This is why Perfect Circle® has introduced a new design in rings called the Tapered Hook Groove (THG) rings. These rings provide slightly better oil control than a reverse twist, taper-face ring, but most importantly, the new second ring acts as a check valve to relieve excessive combustion pressure build-up under the top ring, thus, stabilizing it and reducing the possibility of compression gases being trapped between the top and second ring.

Fire-Power™
 Perfect Circle® Fire-Power piston ring sets are engineered to withstand the punishment of today's high powered, Nitrous-Oxide injected, Turbocharged, and Supercharged race applications. PC479 compression rings will provide superior ring durability, stable radial tension, superior combustion sealing and oil control, while protecting the cylinder walls. All these benefits will net additional horsepower while extending engine life. Perfect Circle's Fire-Power rings can be purchased in boxed engine sets as well as open stock to meet your performance requirements.

Import Performance
Perfect Circle® import applications utilize the latest technologies popular in today's racing piston ring sets with Reduced Radial Wall (RRW) Steel top rings, Reduced Axial Height second rings, and CP-20™ High Conformability/Low Friction oil rings. Both standard, and low tension oil rings are available to best maximize power output in naturally aspirated or power assisted engine combinations.

Claimer Race
Perfect Circle® claimer performance piston ring sets are engineered for oval track claimer series engines. These economy performance ring sets feature many of the same benefits as our race proven premium sets at an economical price. Positively Twisted 5/64" or 1/16" top rings provide outstanding high RPM sealing in a choice of Plain Cast Iron or Moly-Plasma face coatings. These sets also utilize a 5/64" Tapered Face ring or a 1/16" THG, which provides unmatched oil control in race conditions. CP-20™ oil rings are also utilized in Standard Tension and Low Tension for optimum power output.

Top NASCAR and NHRA teams know the importance of quality piston rings - that is why they trust Perfect Circle piston rings every weekend for quality and performance.




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