The Hole Story
News from the honing industry leader

Hone with diamonds in your CK-10 or CV-616 cylinder hones
The Sunnen DH series diamond hone heads can improve results on CK-10 and CV-616 cylinder hones.
Testing shows excellent results when  Sunnen's DH series diamond hone heads are used in the CK-10 or CV-616 to handle today's tough blocks... get the details at the Sunnen PRI booth (#5101).

Sunnen's Automotive Team has some interesting test results to share at PRI 2016, December 8-10 in Indianapolis.  According to Sunnen's Bob Dolder, the tests show how owners of Sunnen's older model cylinder hones can enjoy faster cutting and longer stone life with Sunnen's DH series diamond hone heads, without having to immediately invest in a new machine. Then, when you are ready to step up to a newer model, these tools are compatible with Sunnen's SV-15 and SV-25 machines.  

Sunnen's engine experts, some of the most knowledgeable in the industry, will be on-hand at PRI to answer all your  engine honing questions at the Sunnen booth (#5101)

PRI features the latest in racing technology, and  is the world's largest gathering of motorsports professionals.

For more information, visit:
Engine raffle gets an 850-HP BOOST!
The Sunnen/PRI tradition continues in a big way, with a Nick Ferri-built, LSX 454 custom-built racing engine.  A $3 raffle ticket (and a little luck) takes it home. 

The LSX 454 Nick Ferri-built engine that will be raffled off at PRI 2016.
The 26th year of Sunnen's Charity Engine raffle features a Nick Ferri-built monster.

This year's engine is an LSX 454, estimated 850-HP, estimated 650 ft/lb torque custom-built beauty. Just imagine that beast in your ride.

Get your tickets early and often, because we expect a big response to this one.  The engine will be on display throughout the show at the Sunnen ticket booth. The drawing will be held at PRI on Saturday. Tickets are $3 or 2 for $5.

All ticket proceeds go to Victory Junction , a year-round camp founded by the Kyle Petty Family in honor of their son Adam. The camp provides life-changing experiences for children with chronic medical conditions or serious illnesses.
Tickets can be purchased at the Sunnen Engine Charity Sweepstakes booth at the show (#852), or online by visiting HERE. But hurry, online ticket sales end on December 4th.
NOTE: Winning ticket holder does not need to be present to win. The winner will incur all costs of transporting the engine from the Indiana Convention Center.

See you in Indy! 

Sunnen Products Company
7910 Manchester Rd.
St. Louis, MO 63143

For more information on Sunnen honing equipment and accessories, visit our website at :

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Engine honing lineup featured at PRI 2016
Sunnen's engine honing machines are found in performance racing shops throughout the world,and you can see them in action at the 2016 Sunnen PRI booth (#5101). 

Sunnen SH-4000 at Oliver Racing
VIDEO: Sunnen SH-4000 at Oliver Racing. Click to watch.

Sunnen's SH-4000  is the industry's premier horizontal hone for connecting rods. It is engineered to improve operator productivity while achieving the extreme tolerances required in today's high-performance engines.

The Sunnen SV-25 honing system.

The SV-25 honing system  is the next generation cylinder honing system, complete with proven ball-screw servo stroking system and Windows®-based touch screen controls.

The Sunnen SV-15 honing system.

Sunnen's SV-15 has a powerful control and is designed with precision, durability and advanced technology. It is power packed with two motors -- one for the spindle and one for the stroker -- allowing you to achieve virtually any desired crosshatch angle.  

Also on display at PRI is Sunnen's popular CH-100 line hone.