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

[22Si]

Thak you for this!

If possible id try to get a FL5 with factory exhaust/resonator delete to try it too. Here why.

De5 already has resonator delete but also the pops abd bangs.

Fl5 has a horrible exhaust sound and people spend thousands on an exhaust only to add crap sound and maybe one horsepower. This is a great alternative and will sound better. Plus when ready to unleash power, they can tune for the downpipe.

Sponsored

 

[SBX Performance]

Thak you for this!

If possible id try to get a FL5 with factory exhaust/resonator delete to try it too. Here why.

De5 already has resonator delete but also the pops abd bangs.

Fl5 has a horrible exhaust sound and people spend thousands on an exhaust only to add crap sound and maybe one horsepower. This is a great alternative and will sound better. Plus when ready to unleash power, they can tune for the downpipe.

Thank you for your insight and suggestion. I am working on front pipe right now next then continuing with hopefully a better sounding option than whats on the market. Agreed all exhausts sound like crap mostly on the FL5 LOL In my blog I said stop wasting money on exhaust systems it should be the last thing to do on a build. I will post videos of it on other cars too before and after. The 4 inch elbow really opens it up a bit. Tomorrow night is the Dyno. Fully stock car

 

[Websitesdown]

Thank you for your insight and suggestion. I am working on front pipe right now next then continuing with hopefully a better sounding option than whats on the market. Agreed all exhausts sound like crap mostly on the FL5 LOL In my blog I said stop wasting money on exhaust systems it should be the last thing to do on a build. I will post videos of it on other cars too before and after. The 4 inch elbow really opens it up a bit. Tomorrow night is the Dyno. Fully stock car

Yeah everything I've been researching points me towards your conclusion, not worth it yet. I'll do a mid resonator delete then purchase a front pipe / downpipe / turbo then hit the fuel system once things stop catching on fire . I already have the canflex and I'm getting tuned by derik right now.

I don't have the money for all the pretty mods you guys do " family life " but love more power right from the get go and will spend money there first.

When I had my si I pretty much took the same approach and it worked out perfect. Difference is I'm never getting rid of this car. This one will pass down through generations.

Thank you for your work!

 

[Cueyo]

If you're taking ideas for an exhaust down the road, imo all you have to do is:

-make something slightly lighter than the stock one
-adjustable tips
-slightly louder than the type S exhaust
-OEM valve functionality maintained but the option to have the valve always on.
- make it look close to stock

Tuning the sound of course is the hardest part, just don't make it tinny.

Boom everyone on the forum buys, yw

 

[ctechauto]

If you're taking ideas for an exhaust down the road, imo all you have to do is:

-make something slightly lighter than the stock one
-adjustable tips
-slightly louder than the type S exhaust
-OEM valve functionality maintained but the option to have the valve always on.

Tuning the sound of course is the hardest part, just don't make it tinny.

Boom everyone on the forum buys, yw

and if you're going to make a valved exhaust, please for the love of whatever-you-believe in to make sure the valve DOESN'T rattle with the OEM valve actuator. More often than not every valved exhaust we've installed for customers regardless of brand rattles at some point no matter how much finagling you do with the actuator spring and it really turns us off to recommending aftermarket valved exhausts (unless they just plan to keep the valve open, which kind of defeats the purpose of a valved one to begin with)

 

[SBX Performance]

If you're taking ideas for an exhaust down the road, imo all you have to do is:

-make something slightly lighter than the stock one
-adjustable tips
-slightly louder than the type S exhaust
-OEM valve functionality maintained but the option to have the valve always on.
- make it look close to stock

Tuning the sound of course is the hardest part, just don't make it tinny.

Boom everyone on the forum buys, yw

Appreciate you and all your input always lol. I already have the CAD drawings of my plan cause I’m sick of the crappy sounding exhaust from this car. Kinda similar to my plans. I’m old I don’t like loud and drone lol Front pipe first though one thing at a time boys lol

 

[22Si]

If you're taking ideas for an exhaust down the road, imo all you have to do is:

-make something slightly lighter than the stock one
-adjustable tips
-slightly louder than the type S exhaust
-OEM valve functionality maintained but the option to have the valve always on.
- make it look close to stock

Tuning the sound of course is the hardest part, just don't make it tinny.

Boom everyone on the forum buys, yw

Just get the downpipe, im sure it'll make it throatier and retain everything. Then maybe delete the resonator.

That way everything is retained andddd it'll add power when you tune. You can then add ITS pops and burble and it'll sound the same!

 

[Websitesdown]

Just get the downpipe, im sure it'll make it throatier and retain everything. Then maybe delete the resonator

The correct approach for now. I had read somewhere people have 550ish with stock exhaust.

 

[SBX Performance]

The correct approach for now. I had read somewhere people have 550ish with stock exhaust.

downpipe and front pipe is all you need until your maxed out and need the volume

 

[SBX Performance]

Real talk before anyone says, “lol 12 hp from a downpipe.” That reaction is fair, so here’s what actually happened.

We tested a bone-stock DE5 Integra Type S on the same day, same dyno, back-to-back. Stock tune. No intake. No other mods.
The only change was the downpipe: OEM vs our SBX catted downpipe.

Blue = SBX
Red = OEM

Result: +12.5 whp up top, more torque to redline, and basically the same boost: 23.0 vs 22.2 psi.

I’ll be honest I was surprised it gained anything on a stock tune. On these cars, the factory ECU is usually trying to hit a set boost and torque target, so it can cancel out a lot of bolt-on gains. A downpipe by itself is not supposed to be some huge peak-power mod on a stock tune.

So why does it matter?

Because the real benefit is reducing backpressure.

Less restriction after the turbo means the turbo does not have to work as hard to move exhaust out. That helps the engine breathe better, keeps heat under control, and can help the ECU pull less timing.

The important part is this: it made more power at basically the same boost. That means this was not a boost trick. The car was simply breathing better.

And this matters even more as the build grows. On the stock turbo, you see a small gain. With a bigger turbo and more boost, the OEM downpipe becomes a much bigger restriction.
A downpipe is a foundation mod. It helps everything work better together

Watch the graph up top. The OEM pipe starts to fall off, while the SBX pipe keeps pulling. That gap growing with RPM is the flow advantage. Bigger turbo or tune should should much better gains
Honest caveats so nobody can "gotcha" me: it's ONE clean back-to-back. A good one, same car, same day, same dyno, same weather That's the whole truth, nothing hidden.

CEL Free — Guaranteed (catted)

Genuine GESI GEN2 high-flow cat — real published part #, nothing scratched off

Hand-built in the USA

Full 4" flush off the turbo

Not trying to sell you a dyno queen. Just showing real data, with the conditions, and explaining what it actually means.
Also thank you to Rob Webster for sacrificing your stock DE5 for the community this week haha

On that note im comfortable taking pre order fully! SBX Performance FL5 / DE5 / FK8 High-Flow Catted Downpipe | GESI #85200

 

[blueroadster]

Sweet...Thanks for the update. Ready to order and sent you a PM.

 

[SBX Performance]

If you're taking ideas for an exhaust down the road, imo all you have to do is:

-make something slightly lighter than the stock one
-adjustable tips
-slightly louder than the type S exhaust
-OEM valve functionality maintained but the option to have the valve always on.
- make it look close to stock

Tuning the sound of course is the hardest part, just don't make it tinny.

Boom everyone on the forum buys, yw

Thank you for the extra ideas appreciated! I have a plan developed already just doing one step at a time..downpipe, frontpipe then exhaust I will add these to the idea list lol pretty much same concept i was looking at. I really hate how every exhaust sounds on the market

 

[SBX Performance]

FULL Production begins this week!!! Not only my downpips but also PTP is hard at work getting the SBX Downpipe Blankets and Turbo Blankets going.

Also attached is the backpressure test on a totally stock DE5

 

[SBX Performance]

Production Progressing Well. Lower elbow to front pipe flange and to transition cone to Gesi cat. Nothing but smooth transitions.

 

[SBX Performance]

Production Update


I want to give everyone an honest update on the first production run of the SBX downpipes.


Material delays were a major factor in the timeline, and unfortunately that part was outside of my control. A lot of manufacturers are dealing with higher material costs, supply issues, and delays getting the raw materials they need.


I completely understand how frustrating it is to wait. I’m waiting too, because my own car is off the road until these are finished.


My welder is also taking a one-week vacation starting today and will be back Friday. I know that adds a little more time, but I am not going to hand these parts off to another welder just to save a few days. Quality control is the most important part of this entire project, and I would rather wait than rush the first production run or change the process midway through.


This is my first production run of an SBX-manufactured part, and I need to make sure it is done right. I know I will never make everyone happy, but I am confident the parts will speak for themselves once they are in your hands.


The good news is that production is now running much more smoothly and consistently. My welder expects to be able to move through them quickly once he returns.


As mentioned before, I am prioritizing the first 25 orders and getting those shipped out first.


Thank you again for your patience and for supporting SBX. I genuinely appreciate everyone who has trusted me with this project, and I’m sorry again for the delays.