Aftermarket Product ReviewProvide questions and answers about aftermarket parts for the Third Generation F-Body.
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I just finished installing a set of these om my 92 Camaro. What a difference they make. As soon as I pulled out of the driveway I noticed how much it helps. There were no creeks and a hell of a lot less rattles especially in the dash. I had a previous camaro with t-tops and had a set of mac subframe connectors and they really help much at all. I like the UMI set. Nice quallity and nice finish. Here is the link for them UMI Performance Inc.
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They stick out just below the pinch welds maybe about a 1/4" or less. You might be able to see them if you dont have ground effects. I have the rear package and tourque arm. I did not get the relocation brackets. They make a good product. Im just waiting for them to make a sturt tower brace for third gens.
I bought the '91 Z28 in my signature from the friend of the owner of UMI. At the time (September-October 2005) there was consideration to use this car to create one's that would fit dual cats. It didn't work out and I'm guessing to date they have not created them.
I met the owner of UMI when purchasing my Z28 and he was very nice. It has always been my intention to go to him ASAP to have him put subframes on my dual cat '91 Z28, I just haven't been able to do it yet. If I am able to do it I will post up on this board.
Thanks for the info, 92. If it does happen, please do let us know. I guess if I end up having this job done this summer, I'll have to buy SFCs from elsewhere that will definitely fit my Formula.
I have a dual cat Iroc and the spohn sfc's fit my car with the removal of a heat shield above the cat
That is very good to know, thank you.
I was wanting to buy the SFCs that Lon over at TDS carries since he is such a good guy to deal with. Will have to ask him if his fit the dual cat cars. If not, Spohn might be the way to go!
They do make an all around great product. They were easy to put on. I even noticed now with more driving I have almost no rattles in the doors. With all there rear suspension peices in my car and there torque arm my car hanldles and drives really nice.
I just installed the Umi Perfomance Subframe connectors underneath my Iroc along with the full tubular set up. Also the traction bar/LCA's and driveshaft loop were installed as well. Everything turned out great and you will notice an immediate improvement in the stiffnes of the ride. I would compare it to a go kart with a smile! I am running KYB's also. The biggest improvement is the chassis response. The car has a new 350 crate motor in it with a rebuilt 700R4 with 2400 stall and will bark the tires like dog on crack!! (smile) They are worth the money and reasonably priced at $199 on EBay
Ive also recently installed a set of UMI's subframe connectors on an 89 firebird that i just recently picked up. I have to say that the installation was totally straight foward, it was unbelieveable how easy they were to install. For the price and quality of these pieces its an absolute no brainer. Subframe connectors should be #1 on everyones list for chassis upgrades.
No the subframe connectors were just welded in at the mounting points to the existing frames and not the floor panels. As far as the weight I would say about 30lbs each but again very effective in stiffening up the chassis. Even with the performance 700R4 rebuild with 2400 stall now you can feel the firm shifts a lot more. The only drawback is the chassis is stiffened up so much now with the additional tubular products that ride quality has really suffered so don't plan on road trips with these installed unless you have an OEM style seat to absorb the bumps and bruises. The aftermarket RC's that I have offer no relief. The car has been reduced now to a short trip to the drags or around town and back home! Forget the long summer drives down 95 and I-26! Then again I have a nice restoration project with another Iroc to cover that one as well!! I will install a nice 8 point powdercoated cage as eye candy but no subframe connectors and see how it affects that one. Stay tuned!!
I have a Brand new set of UMI subframe connectors sitting in front of me right now. They look great, very well made. I cant wait to get them installed along with their lower control arm relocation brackets. Oh, as far as weight goes, i just weighed both subframe connectors on a shipping scale and they show 32.8 lbs. Scale was just calibrated so should be 100% accurate.
Good deal! Let me know your opinion about the ride quality afterwards. Mine rides like a covered wagon now that I've install all the tubular components. Glad I didn't stiffen up the springs or I'd be hatin life!!
When welding do you need to take the interior carpet out?
After installation is done can you jack the car up from this point?
Should the car be on a roll on lift when installing or can it be lifted without weight on all the suspension parts?
You dont need to take it out, you can slide some 1x2's under it enough to lift the carpet by removing the door sills and front seats.
You can use it as a jacking point which is another reason for installing them on mine.
Car should be level with suspension loaded, Roll on lift or similar. Reason for that is the body can twist and bend slightly. Welding the subframe connectors on when the body is twisted etc will permanently keep it that way. I will be using 4 drive on Ramps, drive the front onto two, and then use a jack to raise the rear end keeping the suspension loaded and place the rear ramps under the wheels.
Car should be level with suspension loaded, Roll on lift or similar. Reason for that is the body can twist and bend slightly. Welding the subframe connectors on when the body is twisted etc will permanently keep it that way. I will be using 4 drive on Ramps, drive the front onto two, and then use a jack to raise the rear end keeping the suspension loaded and place the rear ramps under the wheels.
That is what i was thinking but from looking at UMI's installation pics it shows it on a two post lift... I guess it would be safer to do it on a roll on lift or on ramps... any other opinions?
for those that want pics, you can go to ebay and find these SFC. In the ad there will be installed pics of them on a 3rd gen. I have been debating weather or not to install these and ditch my roll cage or just leave my car alone already/
I'll have the subframe connectors put on in the next few weeks but an 8 pt roll bar is next. I plan on being in the 10's this year, so it really isnt an option........jt
I bought a set from UMI also, along with some other things. Very good quality on all of their pieces.
I bought it all from Shon at Herron Performance, good seller with good communication and great prices. Even free shipping! (Link: http://www.herronperformance.com/store/ )
I will be buying more stuff from UMI/Herron Performance in the near future.
i know this has probly been asked a million times but do they work on verts? I love UMI's parts and really need some sfc's so my dad stops telling me how crappy my car is b/c it makes too much noise lol. Plus it will probly have too much power for the stock unibody to put up with when im done with it.
~Edelbrock open element air cleaner~Edelbrock TES headers and y pipe~3" Magnaflow converter~3" cutout~Flowmaster cat-back~AIR delete~3.73 posi rear end~UMI Panhard Bar~Monroe Sensa Trac rear shocks~Energy suspension poly torque arm bushing~Energy Suspension trans mount~
Straight from their site, will NOT fit verts, although I don't know exactly why. I'm pretty positive the SFC's TDS carries will fit a vert, since it IS Top Down Solutions. If you want different ones than that there are other mfg's out there.
Straight from their site, will NOT fit verts, although I don't know exactly why. I'm pretty positive the SFC's TDS carries will fit a vert, since it IS Top Down Solutions. If you want different ones than that there are other mfg's out there.
convertibles have a U channel brace piece that runs in the same location that most SFCs go.
spohn does make a set that fits verts... along with some other vendors.
? sorry not to educated in chasis or f-bodys yet...still young lol...but i was tryin to look under my car hard to do considering how low it sits but where the lower control arms connect...i was noticing that the umi sfcs have no attachment points for the lower control arms so do i have to cut off the old connecting points..??? another? the piece that goes above the exhaust and behind the cat...how big is that piece i dont have a hole lot of room there..like how thick is that piece?? and not tryin to be a cheap skate but im not rich here...u guys know somewhere that i can get the umi sfcs with free shipping?? lol
__________________ 383 in the works, 4 bolt main 880 roller block, Scat 9000 series 3.75" stroke crank, Scat 6" stroker rods, SRP -16cc 0.040" over dished pistons, Total seal rings, ARP hardware, Moroso oiling system, Brodix IK200 Heads(ported) Holley stealth ram, welded and ported to 1206. cam yet to be decided
just ordered a set as well with the discount... best saved 30 dollars ever. hopefully the install goes as easy as seems. does anyone have a side pic of UMI SFCs installed on a trans am with the gfx?
Got any pics? 
I'm pretty positive the SFC's TDS carries will fit a vert, since it IS Top Down Solutions. 
