I am looking to get a set, but I want to hear what you guys have, what fits best, etc. I have heard that some don't fit that well with the dual cats sometimes. I don't kow how much truth there is to that, but I am curious. I want to avoid any stress cracks in the roof pillar area, epecially since I am getting paint job in the spring.

 

spohn here, i think they're great.

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1992 Camaro Z28
Stock
5 Spd

 

Alston's fit great with dual cats. Search the Chassis/Suspenion/Brakes board for more info, this topic comes up all the time.

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1991 Camaro Z28
5.7L 5-Speed (originally 305)
317 RWHP, 418 RWTQ
13.23 @ 107.62 MPH (2.10 60')
Southern California
Member: SoCal 3rd Gen F-Bodies
Member: SoCal F-Bodies
-=ICON Motorsports=-

 

I've put in a few, the Jegsters are the best so far as long as you get the bolt in version, bolt them in, then weld them in.

 

Alston's here.

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1982 Z28:355,4 Speed,Lots of bolt ons

 

SouthSide Machine SFC's are the best. These, along with the Spohn and Global West SFC's are the only ones that get welded along the rocker panel to further stiffen the body and not just connect the front and rear sub-frames. Being made out of rectangular tubing also makes them great jacking points.

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Greg Westphal
'87 IROC 355TPI/A4

 

Greg,

Do you have dual cat's? I am looking at getting the SSM's or the Spoohn's. Not sure how the SSM's fit with dual cats??? Any help would be greatly appricaited.

 

Alston's here. One of only two so far that will fit a 'vert.

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90 RS Convertible
Owner: Top-Down Solutions
(626)369-0040

http://www.sc3gfb.org/members/lonsal.html
http://www.taskerinc.com/gs3/profiles/Lon_profile.htm

 

Nope, I don't have dual cats, but I know somebody with a '91 Formula 350 with dual cats that does have the SSM SFC's. The Spohn's will only half-fit. The long pieces that run along the rocker panels will fit, but the right-side brace going from the SFC to the tranny tunnel probably won't fit, sometimes even on single-cat cars. That's about the only difference, except that the Spohn SFC's are powdercoated and the SSM's are bare (paint to match your car if you want).

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Greg Westphal
'87 IROC 355TPI/A4

 

Spohn has two versions: single cat and dual cat. The dual cat version has the piece for the rail to the trans tunnel not attached to be able to weld it in to clear the cats.

Also, powder coating is extra $$.

 

So will the SSM's fit with my dual cats? If not, what must be done?

 

I have spohn's. mine are a tubular fit however probably a bit diffenten that what most of you have, they have solidified my Z substantially.

 

The AIR tubes to the converters may have to be relocated and rewelded. They may also have to notch the SFC.

 

The SSM will NOT work with dual cats, not even close, I know from experience.

Get the Spohn dual cat version, they fit perfectly on my car and made a night and day difference, I'm VERY happy with them!

 

Spohn's fit awesome, I have them on my car.

Just my opinion though.

 

The kenny brown super subframes also weld along the pinch paneling underneath the rocker panels and make it a "full frame". They are also made of tubular steel which i feel is stronger

 

DIY ones here. fits perfectly and up to 20% stronger than brand X


-P

 

SSM SFCs fit with dual-cats without modification.

 

Formula9 I have factory dual cats and the SSM weren't even close to fitting, I sent them back to Summit.

Maybe you have an aftermarket dual cat y-pipe but the stock one no way will they fit.

 

A friend of mine had them put on a '91 Formula 350 and a '92 Z28 5.7L both with dual cats and the exhuast had to be modded both times.

 

i'm going to use southside sfc
i'm not going to run any cats.



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1986 Iroc 305 small block chevy: ported heads, 1 3/4 slp headers, rpm intake(ported), 1.6 roller rockers, performance valvejob, titanium retainers, compcams conical valvesprings looking for cam.

 

Alston's here too. Got them on a group purchase a few years ago. Everyone has been having problems with the bolt holes getting loose but I have yet to feel any play in either of mine. I'll weld them this spring when I have to install my LCA relocation brackets and weld the axle tubes to the carrier housing. It's all good though. Any SFC is better than none.

 

Kenny Browns here, Changed the whole feel of the car. Nice and tight now.

 

made my own, way better and way cheaper than any you can buy, but a bit heavier than most.

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ICON Motorsports
1st & 3rd
MM Black Diamond 538 F&AM

 

I agree with Greg Westphal. The SSM and others that are welded along the rocker panel are much better. I have SSM, they didn't fit my SLP y-pipe and single cat. I had to cut out and reweld a small piece but after that they fit fine.

 

I have a brand new set of SSM Lift bars complete with non fitting SFCs that interfere with my dual cats(92 Z28 L98). It required modifying the cat or the SFC and neither I was willing to do, went with Alston SFCs and had no problems what so ever. Anyone want a complete SSM Lift Bar Kit for a good price?