Just a heads up, avoid putting a bolt in 6 point wolfe cage in with double diamond subframe connectors.. Its a nightmare, at least mine was and still is.. The main hoop plates for under the car go right where the subframe fits snug against the floor. So you have to hammer and pry to get it between the two. And to top it off the Wolfe cage has 4 bolts per side in the main hoop and go figure 1 comes through where the subframe connector is on the passenger and 2 on the driver. So save yourself the headache and avoid double diamond subframes if you plan on getting a bolt in cage. Just from my experience.

 

I've been running this setup for years. I like the fact that the roll bar ties into the sub frame connectors; ties the bar into some "meat". Sure it took some extra work drilling the holes through the sub frame; I just installed some longer bolts. Sharp drill bits work wonders along with applying some cutting fluid.

 

yes i agree.. In the end it was more work, but like you stated, the cage is tied into the subframes, so better yet..

 

Better yet.... don't get a bolt-in roll-bar... There's a reason it's not NHRA legal...

 

A bolt-in roll bar is NHRA legal in a uni-body car with stock floor and firewall. Section 20 - General Regulations, 4:10 ROLL BAR of the Rule Book details the specific requirements for a bolt-in bar, including the size of the plates (6" x 6" x 0.125"thick, required on both sides of the floor) and the number (4) and diameter (3/8") of the bolts.

When I had my custom roll bar installed, I told them to connect the rear hoop to the rear subframes, the front connections for the sidebar to the front subframes, and to then connect the front and rear subframes with the same chrome-moly tubing.

 

4:10 ROLL BAR

All roll bars must be within 6 inches of the rear, or side, of the
driver’s head, extend in height at least 3 inches above the driver’s
helmet with driver in normal driving position or be within 1 inch of
the roof/headliner in the area above the driver's helmet, and be at
least as wide as the driver's shoulders or within 1 inch of the
driver's door. Roll bar must be adequately supported or crossbraced
to prevent forward or lateral collapse. Rear braces must be
of the same diameter and wall thickness as the roll bar and
intersect with the roll bar at a point not more than 5 inches from the
top of the roll bar. Crossbar and rear braces must be welded to
main hoop. Sidebar must be included on driver’s side and must
pass the driver at a point midway between the shoulder and elbow.
Swing-out sidebar permitted. All roll bars must have in their
construction a cross bar for seat bracing and as the shoulder
harness attachment point; cross bar must be installed no more than
4 inches below, and not above, the driver’s shoulders or to side bar.
All vehicles with OEM frame must have roll bar welded or bolted to
frame; installation of frame connectors on unibody cars does not
constitute a frame; therefore it is not necessary to have the roll bar
attached to the frame. Unibody cars with stock floor and firewall
(wheeltubs permitted) may attach roll bar with 6-inch x 6-inch x
.125-inch steel plates on top and bottom of floor bolted together
with at least four 3/8-inch bolts and nuts, or weld main hoop to
rocker sill area with .125-inch reinforcing plates, with plates welded
completely. All 4130 chromoly tube welding must be done by
approved TIG heliarc process; mild steel welding must be done by
approved MIG wire feed or approved TIG heliarc process. Welding
must be free of slag and porosity. Any grinding of welds prohibited.
See illustration. Roll bar must be padded anywhere driver’s helmet
may contact it while in driving position. Adequate padding must
have minimum 1/4-inch compression or meet SFI Spec 45.1. All
cars running 180 mph or faster, SFI Spec 45.1 mandatory.