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Discussion Starter · #1 ·
Hey guys

Just wanted to know what you guys are using. I currently have stock lower arms and I believe the bushings are starting to go.

On my other cars, I have been using only heim joint lower arms and it tends to be bit noisy on the street.

I am considering the two below:

Ford Performance Parts M-5538-A Ford Performance Parts Lower Control Arms | Summit Racing GT500 arms
or
FORD Ford Performance Parts M-5649-R1 Ford Performance Parts Lower Control Arms | Summit Racing Boss 302 arms

Thank you
 

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whateveryou get, try for greaseable and be sure to use the right grease....not the usual grease for suspension parts...full synthetic, preferably the brand Super Lube.
 
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I went w/ Steeda LCA's...got good deal when they were on sale.
 
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Another great mod question, based on preventive maintenance. Our Bullitt's are aging.
Prior to getting track addicted, I replaced the OEM rear lower control arms with the Steeda billet aluminum. I went with the billet for the side under carriage bling at car shows rather than the discrete Steeda chromoly, which are $90 less, same quality. Over 80k miles and 55+ track days and no issue with the poly bushings, no increase in NVH. Came with synthetic grease tube.
But when installing the new RLCA's, also installed RLCA relocation brackets, which allow you to change the angle of the RLCA and "stop (reduce) the hop" in the rear from hard accleration and cornering, even on street driving. (With you considering the 255-45 tyres on the Bullitt rims, you will get about 3/4" wider footprint, increasing grip and potential hop.) Helps keep the rear planted.
Used the Ford Performance relocation brackets (M5650A), which are easier bolt on, rather than Steeda which are welded on. The Ford Performance brackets have 3 settings, have used the middle and am very satisfied, as BLLTT is only dropped 1/4" lower than OEM spec. The lower setting is for furthur dropped suspensions.
Looked at the specs for your choices.
M5538A is for the S197 GT500, which is a supercharged 4.6L. A lot more HP than our Bullitt.
M5649R1 is for the S197 Boss, 5L Coyote, a lot more HP and designed for track racing.
Neither mentions effect on NVH. Our S197 Bullitt is already very viseral in daily driving feel. Both optioned the non-adjustable sperical bearing ends, which are for racing and would increase NVH.
Both recommened the FP 5650A brackets.
Checked RonReam's Roush RLCA, and not listed at Roush Performance currently.
Bullit4404, Pat, our resident Bullitt crew chief reviews this!
 

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I replaced the tired LCA on my 08 Bullitt with the M5538A and I'm happy with them for street driving. I tried the M5649R1 on my 08 GT500. They transmitted a lot of rear end noise and I went back to the M5538A.
 

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My story is pretty close to tossass4370. However, I got the ones with a spherical bearing on one end (and then put a coating of plasti-dip on them so they weren't noticeable). I used the Ford Racing lower control arm relocation kit on mine, too. I actually welded mine in place in addition to the bolts. My car is lowered a bit (FR3A suspension kit), so I'm on the middle hole, too. Sometime I'd like to switch them before going to the drag strip and see if it helps my 60' times, but for autocrossing and road course the middle hole is the most appropriate location. My upper control arm is also adjustable with a spherical bearing on the differential side. The other place I used the "race bushing" was on my MGW shifter. Honestly, I can't tell that it's noticeably louder from an NVH standpoint. Part of that may be to the FR500 mufflers, but I really didn't think it was too bad before they were added. I am probably lucky that my differential happens to be pretty quiet. As soon as clearances start getting out of whack I'm sure it'll howl. At 55k miles it's still doing pretty good. At this point I have no regrets. Between the 2 you mentioned, it just depends on your tolerance for NVH. I'd use the R1, as they are less likely to let it wheel hop.
 

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10.17.1968
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Old post, but I have run both the 302's and the GT500's. I took the 302's off and boxed them back up after a week due to NVH. They made it sound as if both rear wheel bearings were shot. I installed a set of the GT500's and there is still a slight amount of NVH, but you have to be listening closely to hear it.
 

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Discussion Starter · #11 · (Edited)
I ended up doing the whole suspension, Bushings on the car was okay but not great. Front and rear bushings were torn.

MM road and track grip box (using Boss 302 R1 arms currently for street)
MM front sway bar
MM rear relocation brackets
MM bumpsteer kit
Whiteline front brace
Whiteline end-links
FP GT500 front control arms
13" brake upgrade with 2011+ bracket powdercoated to match the calipers
FP 2013-2014 Shelby GT500 brake cooling shields
Stoptech front rotors
PF front brake pads & GT500 rear brake pads
FP Boss 302 brake lines
FP Boss 302 Radiator
FP GT500 radiator fan
FP trans cooler scoop
FP aluminum driveshaft (*OEM Driveshaft broke at the CV joint during canyon run. 2 bolts holding the joint bracket to the body came out.)
CE bolt in driveshaft loop
GT500 rear upper arm, bracket & 2014 GT500 diff bushings
20mm rear sway bar lateral locks
FP Boss 302 torsen differential
FP rear differential cover
Barton shifter with solid bronze bushings
Muffler delete with magnaflow resonators
Romac balancer
KB jacking rails
CDC font chin spoiler
Alignment and corner balanced

The car is done and fun. Good canyon carver.

Need to get new tires very soon. Purchased another set of original bullitt wheels to put track tires on. Currently running cooper 235's
Still debating on putting GT500 front calipers with supporting parts and spacers. 2011+ bracket, rotor, PF pads set up doing okay for now...
 

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I'm a little late to the party here but I recently upgraded my Rear suspension with:
BMR Adjustable Lower Control Arms
BMR Non adjustable Upper Control Arm
BMR Adjustable Pan Hard Bar
BMR Pan Hard Bar support

The Adjustable Lower Control arm had one spherical bushing and the rest of the bushings were Poly all around. Man did that spherical bushing really clunk over bumps at low speeds. At Highway speeds it wasn't too bad. The car felt solid and my wheel hop was gone. However the clunking was driving me nuts. Every time I pulled out of the driveway and drove out of the neighborhood it just sounded awful. So I bought a BMR non adjustable Lower control arm and just installed tonight and took the Bullitt for a spin. Much better! Unfortunately lowering the car will require either an upper adjustable arm or another set of lower adjustable arms. So I doubt lowering springs are in my future.

Anyway I'm happy with the BMR equipment. It really solidified the rear of the car if you use the poly bushings. You can get scratch and dent from their website for a discount. I picked up the Non adjustables as Scratch n dent. I could not find any scratches or dents but saved $40. I did see a minor blemish on the metal insert on one side of a bushing.
 
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Hey guys

Just wanted to know what you guys are using. I currently have stock lower arms and I believe the bushings are starting to go.

On my other cars, I have been using only heim joint lower arms and it tends to be bit noisy on the street.

I am considering the two below:

Ford Performance Parts M-5538-A Ford Performance Parts Lower Control Arms | Summit Racing GT500 arms
or
FORD Ford Performance Parts M-5649-R1 Ford Performance Parts Lower Control Arms | Summit Racing Boss 302 arms

Thank you
Just saw this older post but had to add that the Steeda billet LCA’s really changed my B for the better when I put them on in 2010. I also purchased their upper control arm, but never got around to installing it! Now I have #2148 for sale but have never regretted that LCA mod.
 
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