Please read the instructions completely BEFORE starting this project.
Competition Engineering 10-Point Roll Cages are not designed for use in vehicles where the stock
floor has been removed. Check your sanctioning body's rulebook for installation guidelines.
To help you install this 10-Point Roll Cage; we've provided you with this step-by-step instruction
manual. These directions are a general guideline for a typical roll cage installation and are not written
specifically for your application. If you have installed a roll cage before, this will be a quick refresher
The installation process will involve fitting the cage components into the race car, trimming the bars to
fit and then tack welding the tubing together before making the final welds. By following this procedure,
any minor mistakes can be corrected easily and with the smallest loss of valuable time.
This Roll Cage has been designed to eliminate some of the more critical operations for you, the
installer. Some of the tubes have had the notches roughed in for you but will still require some minor
trimming to meet your specific needs. Refinement of the notches should be done as carefully as
possible. We recommend using a hand grinder or if possible a holesaw type tube notcher to prepare the
ends of the tube for proper fit. The notches should allow for a slight gap to help maximize weld
penetration. Also make sure to dress the notched end of the tube with a grinder or hand file to remove
burrs and provide a chamfer for improved weld appearance.
We recommend that all welds be done with the approved MIG or TIG welding process. A machine with
130-amps or higher should be used. DO NOT USE FLUX CORE WIRE TO WELD THIS ROLL CAGE.
If you are unsure about your welding abilities, have a professional welder complete the installation.
Follow all safety guidelines that are provided with the equipment you are using. Always wear eye
For Technical Assistance, call Competition Engineering's Tech Line at
(203) 458-0542, 8:30am-5:00pm Eastern Time
80 Carter Drive • P.O. Box 1470 • Guilford CT 06437
Phone: (203) 453-6571 • Fax: (203) 458-3581
Visit Us At www.competitionengineering.com
Installation Instructions cont. 10-Pt Roll Cages
Page 2 of 7
I. Material parts list with identifying names
II. List of tools required
III. Step-by-step instructions
IV. Illustrations for specific steps
1) Main Hoop
2) Rear Struts 72" Long
1) Main Hoop Crossbrace
12) Gussets
2) Main Hoop Supports 33" Long
1) Top Hoop
2) Door Struts 56" Long
2) Forward Downstruts
6) 6"x6" Plates
Power Band Saw or Hand hacksaw to shorten tubing
Body Grinder with coarse wheel to remove paint and rust. Also to refine tube notches.
MIG or TIG Welder with 130 amp minimum rating
Protective Face Shield for grinding and welding
Sheetmetal Shears to modify or remove interior panels.
Die Grinder or Electric Drill with rotary file to notch tube ends.
Tape Measure, Hammer, C-Clamps, Locking Pliers, Magic Marker
4 Jack Stands to support vehicle
Carpenter's Level and Angle Finder
Bench Vise to hold tubing while grinding and cutting.
For a professional looking installation we highly recommend the following materials and tools:
.030"-.035" Mild steel welding wire
Thin cardboard to cover the windows. This protects the glass from welding and grinder sparks.
80-Grit sandpaper to remove paint and light surface rust
Holesaw type tube notcher
Scrap pieces of sheetmetal to protect the headliner during welding.
Installation Instructions cont. 10-Pt Roll Cages
Page 3 of 7
1. Begin the installation process by removing the interior from the vehicle. This includes both front and
rear seats, carpet and sound deadening.
2. Install the protective cardboard over all exposed interior glass. Don't forget to cover-up your gauges
and radio if they are installed. Grinder and welding sparks go everywhere.
3. Jack-up the vehicle and support it in four places with approved jack stands. You want to take extra
time to make sure the vehicle is level from front to back and side to side. Steel shims can be used
between the jackstands and the chassis to achieve proper level.
NOTE: Do not let the chassis droop on the jackstands. If this is allowed to happen during the roll
cage installation this droop will become permanent.
4. We are now going to trial fit the main hoop. Take a measurement from the headliner to the mounting
point for the base of the main hoop. Turn the main hoop upside down on the shop floor and measure
from the floor to the end of the hoop leg. Mark the hoop legs at the dimension you measured in the
car. Cut the tubes at this mark.
5. With the driver's seat installed and the driver seated with helmet on, determine the position of the
main hoop.
NOTE: It is recommended that the main hoop be no further than 6" from the back of the driver's
Trial fit the main hoop in the car. Try to align the vertical positions of the main hoop with the door
pillar. Make sure it is centered in the vehicle by measuring from the door jam to the edge of the hoop
on each side. If it fits snug, mark the leg positions on the floor with a marker. Remove the hoop from
the car.
6. Place the main hoop flat on the floor and stand the top hoop on the main hoop so that the open ends
of the tubes make contact just below the "A" bends. Check the fit. Modify the ends to achieve a good
weld joint.
7. Grind the area marked in Step 5 so that you can install the supplied 6" x 6" steel plates.
8. Form two of the plates to conform to the floor under the area of the main hoop legs. Tack weld them
in place.
9. Re-install the main hoop in the car and tack weld it to the previously installed plates. Re-check the
position of the main hoop.
10. We are now going to install the rear struts. The rear struts connect the main hoop with the rear frame
at the upper spring mounts. They should be installed parallel to each other and directly over the rear
frame rails.
a. Drop a plumb bob down from the top of the main hoop even with the outside of the rear frame
rails and mark the position on the hoop. This is the outside mounting point for the rear struts.
b. Take a measurement from the mark on the main hoop to the desired end point for the rear struts.
c. Cut the struts to this dimension. Remember to take into account the angle needed, if any, on the
end of the tube.
d. Tack weld the rear struts in place. 6" x 6" floor plates should be used if the vehicle has the stock
floor over the rear frame.
Installation Instructions cont. 10-Pt Roll Cages
Page 4 of 7
11. With the driver seated, measure for the height of the main hoop crossbrace. This is the tube that
mounts between the legs of the main hoop and supports the driver's seat in the event of impact. It
also acts as a structural member for the shoulder harness. Follow your sanctioning body's guideline
for correct placement.
a. Cut the un-notched end of the tube to the correct dimension taking into account the notch that
needs to be added to the end of the tube (typically 5/8" extra).
b. b. Trial fit the crossbrace and tack in place if the fit is correct. Make sure that the tube is level.
12. The next part of the installation is the main hoop supports. These tubes span from the intersection of
the main hoop and main hoop crossbrace to the top of the subframe connector or rear frame rail
near the front ladder bar or 4-link brackets. These supports will improve chassis reaction time and
make the car less flexible.
a. Determine the route for the tube. Make a template of the notch required on the ends of the tube
using a piece of paper wrapped around the end of the tube. Slide the paper up into the location
for the notch and mark the contours on the paper. Trim the paper as if it were the piece of tube
being notched. Refine the cut in the paper until your have a perfect fit. Transfer this shape to the
end of the main hoop supports.
b. Trial fit the tube to the car. Tack weld in place.
13. We will now install the top hoop. The top hoop should be installed so that the front is level and
pushed as high into the roof as possible. It should not limit the driver's vision.
a. Take a measurement from the main hoop to where the front of the top hoop should be. If
necessary, shorten the top hoop to meet this dimension and re-notch.
b. Trial fit the hoop in the car and mark its location on the main hoop.
NOTE: If you are working alone; there are several methods of holding the top hoop in place for tack
welding. One method is to tie a rope around the hoop and hang it from the roof of the car. Or, if you
have access to a ratcheting tie-down, you can support the front of the hoop with a piece of 2"x4" cut
to proper length with a V-notch in one end and loop the tie-down around the top of main hoop and
the front of the top hoop. Tighten the tie-down so that it draws the top hoop towards the main hoop.
c. Check the positioning of the top hoop and tack weld in place.
14. Now measure and install the two forward downstruts. These tubes support the front of the top hoop
and are designed to mount in front of the dashboard. Their position has a direct relationship on the
driver's visibility so space them as far apart as possible and as close the windshield posts as
a. Determine the location of the tubes and where they will meet the floor. Clean this area on the
floor and tack weld another set of 6" x 6" plates.
b. Trial fit the downstrut tubes to determine how much, if any, needs to be trimmed form the end of
the tube. Make sure that the notch fits properly and that you can weld the joint completely.
c. Tack weld the tubes in place.
Installation Instructions cont. 12-Pt Roll Cages
Page 5 of 7
15.The last part of the roll cage to be installed is the door bars. The door bar spans from the main hoop
to the intersection of the front downstruts and the floor plate. Most sanctioning bodies require that
this bar pass by the driver at a point between the shoulder and the elbow. The driver should be
seated in the car to properly locate the door bars.
a. The front of the door bar is to be located at the bottom of the front downstrut where it meets the
floor plate. Notch and fit the front of the door bar so that it gets welded to both the floor plate and
the front downstrut.
b. Notch the back of the door bar to fit against the main hoop. Work slowly and carefully here,
mistakes happen easily on this type of notch.
c. When you are satisfied with the fit, tack weld the bar in place.
16. With all the roll cage tubes tack welded in place, proceed to check each union to ensure that no tack
welds have broken. Secondary tack welds are placed at every union and at areas where previous
tack welds have been completed. You can obtain the best results by following this procedure.
Begin by placing additional tack welds opposite existing tack welds. You will need between two and
three tacks around each tube to prevent the cage from drawing.
Secondary tacks should also be placed in areas that will be difficult to reach during finish welding.
Other areas for secondary tack welds will include tubes that don't fit tightly or are in areas where the
tubes form a deep angle.
17. Finally, we come to the last major step: finish welding all frame substructures and floor plates. This
should be done from side to side and top to bottom of each union, starting from the inboard and
working your way outward to the rocker sill area.
Finish weld the entire roll cage in the same order you installed each component part. Work on the
center section first, then move on to the rear and then the front sections, using the same side to side,
top to bottom welding method.
If any porosity is encountered during welding, grind it out and re-weld. The final finish welding
procedure will include the placement of the triangular gussets at every union where round tubes are
joined in the main cage center section. Check each union to be sure that they are welded 100%.
With the welding completed, the roll cage can be degreased, sanded and painted.
Installation Instructions cont. 10-Pt Roll Cages
Page 6 of 7
Installation Instructions cont. 10-Pt Roll Cages
Page 7 of 7
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