Stay-IN-Play by SMI™

Stay-IN-Play by SMI



Instant power-assisted towed
vehicle brakes for your
hydraulic-braked coach


StayInPlayPhotoStay-IN-Play
for coaches “with
hydraulic brakes”


Endorsed by Henderson’s
& SuperSteer®


What Stay-IN-Play
does for you –

  • This system is always ready. You maintain constant vacuum pressure in your towed vehicle’s power brakes even when the engine is off. Other systems must run a pump when they activate.

  • Stay-IN-Play includes a vacuum pump. Since your coach uses hydraulic instead of air brakes, this system includes a patent pending vacuum cylinder. The harder you brake, the harder it applies your towed vehicle’s power-assisted brakes.

  • MikkelsonquoteCoach Notification
    Anytime your towed vehi-
    cle’s brakes activate, it sounds an alarm. With Coach Notification, if your signal is on, your brakes are on!

  • Panic Stop Braking. Stay-IN-Play’s “Panic Stop” fea-
    ture applies up to three times normal braking power when you need to get out of a jam.

  • Never any unwanted or unnecessary brake activation over bumps or on grades because Stay-IN-Play requires two signals to activate: 1) The coach brake must be applied and 2) There must be sufficient G-forces present to activate the system.

  • undrseatinstall No Setup or Take down. A 9″ X 11″ X 3-1/4″ Operating Unit houses the electronics. You can mount it almost anywhere and never need to remove or hook it up every time you tow (unlike other systems on the market).

  • A Complete Self-Contained Unit. We ship each Stay-IN-Play complete with a breakaway switch and coach notification alarm. No extras to buy. It’s all included.

  • No Major Modifications To Your Towed Vehicle. No holes necessary in the floor of your car as some products demand.

  • Stay-IN-Play means no make-ready time. It never comes out of your car. Just turn it on and tow!


smilogo2inStayinplaylogo2in


For hydraulic brake coaches, we believe this is the towed power-braking system you’ve always wanted but could never get. Next time you step into your coach and do nothing but flip the switch and turn it on, you’ll smile as you put your coach in gear.


Henderson’s Money-Back Guarantee. When Henderson’s installs this unit for you, you must be satisfied with our work or your money back.


Click here for Frequently Asked Questions About SMI Products.

You have choices with Henderson’s to get your job done.

1. We install. Our trained technicians can install your Stay-IN-Play professionally here at Henderson’s. Just phone us for an appointment.
2. You install. If you can’t get to Henderson’s, we’ll ship the parts to you with Installation Instructions. Phone our SuperSteer® Division toll-free at 888-898-3281 or E-mail SuperSteer® at
sales@superstop.com & we’ll help you place the order.

For an appointment with Henderson’s, contact us –

Henderson’s Line-Up
417 S.W. Henderson Lane
Grants Pass, OR 97527

  • Phone us at: 541-479-2882
  • “800″ Phone: 800-245-8309 Ext 1
  • Fax us at: 541-955-6164
  • Office Hours: (PST) 8 a.m. - 5 p.m. Mon-Fri; Closed Noon
    to 1 p.m. If you call after hours, we'll call you back.
  • If you’re driving & unfamiliar with the area, see a map here

  • E-mail us at:

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Henderson's Line-Up, Brake & RV, Inc.
417 SW Henderson Lane, Grants Pass, OR 97527
If you need more information, help with a specific problem,
or want to make a service appointment, call:

(541) 479-2882 or 1 (800) 245-8309
Fax: (541) 955-6164 E-mail: service@hendersonslineup.com
SuperSteer Tech Line: (541) 955-0769
SuperSteer Order Line: 1 (888) 898-3281

BUSINESS HOURS (Pacific Time Zone):
Monday - Friday 8 A.M. to 5 P.M.
Closed Noon to 1 P.M.