Koul Tools Sureseat P-51 Tool Makes Every Tubing Flare, Perfect

Koul Tools Sureseat P-51 Tool Makes Every Tubing Flare, Perfect

When it comes to hardlines in your engine bay, there’s no such thing as “good enough.” Either your flare is awesome and it seals, or it doesn’t. Chances are if it’s being run through a hardline, it’s not something that is very tolerant of “good enough” anyway.

While usually associated with brakes, getting under the hood, the most common substances carried by hardlines in a performance application are fuel and nitrous oxide. No one wants a leaky fuel line, and at the operating pressures of nitrous oxide, even the slightest imperfection in your mating surface can mean a pretty severe leak.

While that used to mean spending tons of money on a high-end flaring tool or paying someone else to do it, altogether, with the advent of Koul Tool’s Sureseat P-51 tool, every flare seals like a perfect flare. The P-51 tool is not a flaring tool, but rather a lapping tool, designed to make a perfectly flat 37- or 45-degree sealing ridge for perfect seal every time.

The incredibly-easy-to-use tool simply requires you to fit the appropriate abrasive lapping head (37- or 45 degree), fit the proper collet onto the tubing (3/16-inch to 1/2-inch diameters), and then fit the collet and tube assembly into the yoke. Add a little lubricant to the lapping head, apply some pressure to the spring-loaded lapping bar while rotating the head back and forth to cut a perfect seat — much like when lapping a valve and valve seat.

The tool makes every flare a perfect flare — as long as you remember to put the nut on before you make the flare (no tool can fix that one). And, if by chance you need to clean up the male flare fitting, the P-51 is the perfect complement to the Koul Tools Fitting Fixer, which does the same thing, but the inverse.

The result of lapping a flare is a perfectly flat seat at the exact correct angle. Making such a perfect flare without a lapping tool takes lots of experience.

Article Sources

About the author

Greg Acosta

Greg has spent nineteen years and counting in automotive publishing, with most of his work having a very technical focus. Always interested in how things work, he enjoys sharing his passion for automotive technology with the reader.
Read My Articles

Drag Racing in your Inbox.

Build your own custom newsletter with the content you love from Dragzine, directly to your inbox, absolutely FREE!

Free WordPress Themes
Dragzine NEWSLETTER - SIGN UP FREE!

We will safeguard your e-mail and only send content you request.

Dragzine - Drag Racing Magazine

We'll send you the most interesting Dragzine articles, news, car features, and videos every week.

Dragzine - Drag Racing Magazine

Dragzine NEWSLETTER - SIGN UP FREE!

We will safeguard your e-mail and only send content you request.

Dragzine - Drag Racing Magazine

Thank you for your subscription.

Subscribe to more FREE Online Magazines!

We think you might like...


Street Muscle Magazine
Hot Rods & Muscle Cars
Diesel Army
Diesel Army
Engine Labs
Engine Tech

Dragzine - Drag Racing Magazine

Thank you for your subscription.

Subscribe to more FREE Online Magazines!

We think you might like...

  • Streetmuscle Hot Rods & Muscle Cars
  • Diesel Army Diesel Army
  • Engine Labs Engine Tech

Dragzine - Drag Racing Magazine

Dragzine

Thank you for your subscription.

Thank you for your subscription.

Dragzine - Drag Racing Magazine

Thank you for your subscription.

Thank you for your subscription.

Loading