🚨 COMING SOON: SBX Performance FL5 / DE5 Catted Downpipe 🚨

[SBX Performance]

More sneak peaks of the prototypes...3.5 inch tappers to 3inch ID at the lower flange.

 

[marcusm86]

Are you gonna offer a cerakote finish of any sorts?

 

[SBX Performance]

Are you gonna offer a cerakote finish of any sorts?

Looking into a good company for that. I am making a downpipe blanket custom from Funk Motorsports but it will take 12 weeks to get customized for the initial then they will be quick after i get that done

 

[Cueyo]

Looking into a good company for that. I am making a downpipe blanket custom from Funk Motorsports but it will take 12 weeks to get customized for the initial then they will be quick after i get that done

I say you don't do cerakote and try to get a swaintech coating going, it's a million times better and actually helps with temps unlike cerakotes 🫣

 

[SBX Performance]

I say you don't do cerakote and try to get a swaintech coating going, it's a million times better and actually helps with temps unlike cerakotes 🫣

I actually looked into that LOL so not a bad idea there is a good place upstate that does is. Issue is I would have to ship to them ship back etc.....Downpipe is already expensive but I guess its optional so people can choose

 

[SBX Performance]

Just an update. I changed the packages to include the titanium upgraded studs. Rampage Fab premium titanium studs in Burnt. 7 of them will be included with each downpipe for upper and lower flange

 

[SBX Performance]

Prototypes on the scale. Daily update

 

[22Si]

Beautiful

 

[SBX Performance]

Beautiful

Making a few changes to it I decided! More to come soon

 

[blueroadster]

Prototypes on the scale. Daily update

Looks awesome using mandrel bends with welds stacked like dimes. I have to ask...On the PIC with the cat, why is there another welded pipe section on the inlet transition cone that is not used on the straight downpipe? Since the PICs are of prototypes, is the end state for production to offer two downpipe options (i.e., one catted and one straight) or one downpipe option that includes a V-band connection to run cat or straight?

For cross reference, the OEM downpipe with heatshield installed weighs 12 lbs. 9.98 oz. (5,726 g) and has a outlet ID of 2.09" (53 mm). The raw TSP downpipe uses cast ends, weighs 14 lbs. 1.79 oz. (6,401 g), and has an outlet ID of 2.83" (72 mm).

 

[SBX Performance]

Looks awesome using mandrel bends with welds stacked like dimes. I have to ask...On the PIC with the cat, why is there another welded pipe section on the inlet transition cone that is not used on the straight downpipe? Since the PICs are of prototypes, is the end state for production to offer two downpipe options (i.e., one catted and one straight) or one downpipe option that includes a V-band connection to run cat or straight?

For cross reference, the OEM downpipe with heatshield installed weighs 12 lbs. 9.98 oz. (5,726 g) and has a outlet ID of 2.09" (53 mm). The raw TSP downpipe uses cast ends, weighs 14 lbs. 1.79 oz. (6,401 g), and has an outlet ID of 2.83" (72 mm).

nice catch and awesome specs you gave thank you!. The additional welded section on the catted version is there because the GESI body changes the transition geometry and packaging requirements compared to the straight pipe version. Mandrel bends are tough to do for this tight packaging thats why most cmpanies use cast becuase of that and its cheaper. The extra section allows it maintain proper flow transition, cat placement and overall fitment while keeping the routing and flange alignment where I wanted it.

At this time the production plan is for two dedicated downpipe configurations:
• Straight-through competition version
• GESI catted version

Rather than a modular V-band swap system which I would never do for a crapload of reasons such as good luck getting those off after awhile and also modular means more places for leaks and intall error etc.

The FL5/DE5 packaging around the turbo/downpipe is tight so the prototype are evolving a bit from the original prototypes and drawings.

Also appreciate the reference measurements and weights definitely useful for me. One of my primary goals with the design is to maximize post turbo flow area while maintaining OEM-like fitment. Like I said mandrel bends are tough but its doable and I will not release it till I get it perfect. Just today I decided I wanted to change the spec a bit at the flanges lol....

 

[blueroadster]

Thanks and makes sense regarding the additional welded section. Really glad to hear that you are not considering a V-band option. Count me in for the GESI catted downpipe.

FWIW, here is a link that includes measurements and weights previously referenced.

 

[SBX Performance]

Thanks and makes sense regarding the additional welded section. Really glad to hear that you are not considering a V-band option. Count me in for the GESI catted downpipe.

FWIW, here is a link that includes measurements and weights previously referenced.

Sorry for the delay and thank you for that info and link I will check it out.

Update on the progress. I sent it back to fab to adjust the specs they were smaller than my CAD specs I had. I did do my CAD for CAST elbows thats one issue because mandrel bends are totally different ballgame. I am going to try and get close as possible to these specs. See pics that is my 3D printed model off my CAD. Should have it back next week sometime then its go time. Def appreciate the support. I wish I could keep prices down but its impossible doing this on such a small scale

 

[blueroadster]

Nice...Another question about the downpipe. Is the upper O2 sensor bung in the same location and vertical orientation as compared to stock? Asking as I'd like to reuse the Dream Automotive Hard-Lagged Turbo Heat Shield where the top ring around the stock O2 sensor helps secure the shield in place. Here is another thread with details and PICs.

 

[SBX Performance]

awesome thanks for doing all the hard work for us with the specs haha appreciated and I will save those for references. Yes the bung is in the same location. Reverse engineered the OEM downpipe heat shield locations and bungs and changed it to this so in theory it should work but not guaranteed

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