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Jeremy K · 09-07-2010, 09:33 PM

From 2010 NHRA rulebook. "...Cars with rear coil springs may relocate the upper control arm at rear-end attachment point. Rear trailing arms may be replaced with NHRA-accepted OEM-type aftermarket units. Aftermarket lower unit must be non-adjustable and have bushed ends (no heims). Aftermarket upper unit may be adjustable and use heim ends instead of bushings..."

09-07-2010, 09:33 PM	#2
Jeremy K Junior Member Join Date: Nov 2009 Location: Bridgewater, NS, Canada Posts: 79 Likes: 0 Liked 1 Time in 1 Post	Re: rear upper control arms From 2010 NHRA rulebook. "...Cars with rear coil springs may relocate the upper control arm at rear-end attachment point. Rear trailing arms may be replaced with NHRA-accepted OEM-type aftermarket units. Aftermarket lower unit must be non-adjustable and have bushed ends (no heims). Aftermarket upper unit may be adjustable and use heim ends instead of bushings..."