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SBX Performance FL5 / DE5 / FK8 GESI Catted Downpipe (3-4 Week eta)
Regular price
$1,499.00
Product INFO
- Vendor SBX Performance
- SKU SBX-FL5-DE5-DP-GESI-RAW
✓ NO CEL GUARANTEE
Built right, runs clean — guaranteed.
Our GESI Catted configuration runs a GESi GEN2 high-flow catalyst, so it cleans up the exhaust and keeps your check engine light off — guaranteed — stock or tuned.
Why it’s priced as a premium piece
This isn’t a mass-produced overseas pipe. Every SBX downpipe is hand-built to order in the USA and spec’d with parts that genuinely cost more, because doing it right costs more:
- GESi GEN2 catalyst — a premium high-flow cat, not a cheap generic core. It’s what earns the no-CEL guarantee and what lasts.
- Precision TIG-welded throughout — clean, even welds and a higher build standard than the mass-produced, overseas-welded competition.
- 304 stainless construction — 4″ off-turbo primary, 3.5″ main body, 3″ outlet, with a G-Sport transition cone for real flow.
- Rampage Fab titanium turbo studs included — Raw or Burnt finish at no extra cost. Most brands make you buy hardware separately.
- Built in the USA, one at a time — by people who actually drive this platform.
Dyno-Tested Back-to-Back
On a bone-stock DE5 Integra Type S, stock tune, same day and same dyno, the only change was OEM downpipe vs SBX GESI catted downpipe.
- +12.5 whp up top
- More torque to redline
- Nearly the same boost: 23.0 psi vs 22.2 psi
The gain came from reduced backpressure, better exhaust flow, improved turbo efficiency, and better heat control — not from simply adding boost. The SBX pipe helped the car keep pulling where the OEM downpipe started to fall off.
In real-world back-to-back testing, we recorded a pre-catalyst backpressure drop from roughly 5 psi down to .25 psi— a measurable reduction in the exact place it matters most. Less backpressure means less pumping loss, a turbo that breathes easier, and power that carries cleaner all the way to redline instead of falling off up top.
Test note: One clean back-to-back test: same car, same day, same dyno, same weather, stock tune, no intake, no other mods.
If you just want the cheapest catted pipe, we’re honestly not it. If you want the best-built one on the platform — the one you bolt on once and forget about — that’s exactly what this is.
SBX Performance FL5 / DE5 Downpipe System
This page covers the SBX FL5 / DE5 GESI Catted downpipe. Choose your stud finish and heat add-ons below.
- 4 inch off-turbo primary section
- 3.5 inch main body
- 3 inch outlet connection
- FL5 Civic Type R / DE5 Integra Type S fitment
- Premium Rampage Fab titanium turbo studs included — choose Raw or Burnt finish at no extra cost
- OEM heat shield compatible — the factory heat shield can be reinstalled, and the required standoffs and bolts are included.
- "Customer Tested, Customer Approved"
ENGINEERED FOR FL5 / DE5
SBX Performance FL5 / DE5 High-Flow Catted Downpipe
Built for the Honda Civic Type R FL5 and Acura Integra Type S DE5, this downpipe is designed to reduce post-turbo restriction, manage heat more effectively, and improve turbo efficiency where it matters most.
The SBX design uses a 4 inch off-turbo primary section directly off the turbo, transitions into a 4.5 inch GESI GEN2 Advanced G-Sport UHO catalyst (#85200, rated up to 850hp), then tapers to a 3 inch outlet to match the factory front pipe location cleanly.
4 in Turbo Outlet 4.5 in GESI GEN2 UHO #85200 3 in Outlet FL5 / DE5 Fitment
Premium hardware. Premium catalyst. Premium design. This is for buyers who want a properly engineered GESI-based downpipe — not the cheapest option on the market. Hand-built in the USA in limited production batches.
Choose Your Package
Every package ships install-ready with premium Rampage Fab titanium turbo studs included. Choose Raw or Burnt Titanium Studs — same kit, same price, just pick your finish.
MOST POPULAR
Complete Package - Raw Titanium Studs
Raw Titanium Stud Finish
$1,499
What's Included:
- SBX High-Flow GESI Catted Downpipe
- 3 Lower JIS High-Strength Steel Flanged Bolts
- 3 Lower JIS Class 10 Flanged Nuts
- Lower 3" Three-Bolt High Temp Gasket
- O2 Sensor Extension Harness
- OEM Heat Shield Standoffs and Bolts
- 4 Premium Rampage Fab Raw Titanium Turbo Studs
- Premium Rampage Fab titanium hardware for the turbo-to-downpipe connection
The clean OEM+ choice for customers who want fresh premium turbo hardware included in the box.
Complete Package - Burnt Titanium Studs
Burnt Titanium Stud Finish
$1,499
What's Included:
- Everything in the Raw Titanium Studs package
- 4 Premium Rampage Fab Burnt Titanium Turbo Studs
- Premium Rampage Fab titanium hardware for the turbo-to-downpipe connection
For customers who want the same complete hardware package with a more aggressive burnt titanium appearance.
Why It's $1,499 — Straight Up
Why It's $1,499 — Straight Up
$1,499 is the price. Not an inflated MSRP with a discount slapped on to look like a deal, and not a teaser rate that jumps after launch. It's what it costs to hand-build this pipe in the USA, one at a time — a real $700+ GESI GEN2 catalyst, titanium turbo studs in the box, and welds we'll stand next to anyone's. You're paying for the parts and the build, not marketing or a middleman. My margin on this is extremely small to keep the pricing at this point so no I cannot discount it.
If material or hardware costs move, the price moves with them — that's why it went up when we switched back to the 4" elbow — and we'll always tell you why. No games.
I'm one guy building a legit company, not a corporation with endless money getting these made overseas for pennies. I appreciate all the support and help through this process.
Why Rampage Fab Titanium Turbo Studs?
The turbo-to-downpipe connection sees extreme heat cycling and is one of the most difficult areas to service later. Premium titanium turbo studs improve corrosion resistance, future serviceability, and overall presentation compared with conventional plated hardware.
Every SBX downpipe ships install-ready with the lower JIS high-strength steel flange bolts and nuts, gasket, O2 extension, and OEM heat shield standoffs and bolts — plus Rampage Fab titanium turbo studs included as standard at the turbo flange. The factory OEM heat shield can be reinstalled. Choose Raw or Burnt titanium finish at the same price.
Optional Add-Ons
SBX × PTP Form-Fit Downpipe Blanket — Lava $349.95 | Black Lava $379.95
Finishes: Lava | Black Lava (blacked-out finish, +$30 — cosmetic only)
Outer layer: fragmentized fire-retardant volcanic rock, rated 1500°F direct heat / 1800°F radiant heat. Internally insulated with high-temperature calcium magnesium silicate wool, rated 1800°F direct heat / 2300°F peak heat.
Built with PTP Turbo Blankets — a form-fitting lava blanket that clamps on and off without shredding or unraveling like taped-on wrap. It limits the heat transferred from your downpipe into the engine bay while helping exhaust gases exit faster through reduced density: longer life for under-hood components, lower intake temps, and sharper throttle response. Unlike header wrap, it won't trap moisture and road salt against the stainless and rot the pipe from the outside.
Select your blanket finish in the SBX × PTP Downpipe Blanket option above — choose No Thanks to skip it, or Lava / Black Lava to add it to your downpipe.
OEM Honda Turbocharger Gasket B — +$97.15
Fresh OEM Honda turbo-to-downpipe gasket for customers who want a completely fresh install, or whose original gasket has already been removed before.
Your factory gasket can usually be reused if it is still in good condition.
Buy it here Honda OEM Turbocharger Turbine Outlet Gasket (Honda PN 18234-RPY-G02) – SBX Performance
Design and Engineering
4 Inch Where It Matters Most
The area directly off the turbo sees the most heat and the greatest restriction. That is where diameter matters most.
GESI GEN2 UHO Catalyst #85200
This is a true 4.5 in GESI GEN2 Advanced G-Sport UHO catalyst, rated up to 850hp.
Specifications
Turbo Outlet
4 in
Catalyst
GESI GEN2 UHO #85200
Outlet
3 in
Material
304 Stainless
Hardware
Titanium Studs Included
Manufacturing
Hand-built USA
Vehicle Fitment
| Make/Model | Chassis Code | Years |
|---|---|---|
| Honda Civic Type R | FL5 | 2023+ |
| Honda Civic Type R | FK8 | 2017–2021 |
| Acura Integra Type S | DE5 | 2024+ |
Engine: 2.0L Turbocharged K20C1
Installation Notes: Professional installation recommended. Tuning may be required depending on setup and power goals. The OEM heat shield can be reinstalled using the included standoffs and bolts.
Warranty
- Weld Warranty: 1 year warranty on welds from the purchase date.
- GESI Catalyst Warranty: 2 year warranty on the GESI catalytic converter from the purchase date.
- Using the SBX Blanket is safe and covered under warrenty
- Exhaust Wrap Notice: Using exhaust wrap on this downpipe voids all warranty coverage. Exhaust wrap can create a superheated moisture barrier between the wrap and the pipe, which can cause the material to break down.
- Tune Notice: Pops and bangs, burble, flame, or aggressive crackle tunes void all warranty coverage. If catalyst failure or damage shows evidence of this type of tune, the warranty claim will be automatically denied.