Tig Welded, 304 Stainless
Argon Back Purged For Purity
2.5” Tubing
For K20C2 Equipped Cars

Description
Vehicle Fitment
Included

RV6 Performance Catted Downpipe - 2016-2021 Honda Civic 2.0L K20C2

Your K20C2 Civic's stuck with a factory manifold that has cats welded right into it. You want to free up the exhaust but you can't just bolt on a header like everyone else. The factory setup's got multiple cats integrated so you're choking on restriction no matter what. RV6 made this downpipe specifically for that problem. It bolts on where the factory manifold ends and gives you one clean piece instead of all that factory garbage. 300 cell high temperature cat. 2.5 inch outlet. 304 stainless throughout. Smooth cast transition. TIG welded and argon back gassed so the welds don't fail. You're getting better exhaust flow. You're getting lower backpressure. You're getting real power gains without having to go full race setup. This is what we run on our own cars when we want a simple downpipe that works.

Here's The Problem With Your Factory Setup

The K20C2 Civic's got a manifold that's bolted to the head with cats welded into it. You can't unbolt it. You can't swap headers because the cats are part of the manifold. That factory setup is restrictive. The tubing's small. The cats are low flow. Exhaust is fighting backpressure trying to get out of that thing. Your engine's not breathing right. You're losing horsepower that could be going to the wheels. We've seen people try to modify the factory manifold thinking they can make it work. You can't. It's a dead end. The downpipe is where you fix this.

This Downpipe Replaces All That Garbage

The RV6 downpipe bolts on right after the factory manifold and gives you a clean 2.5 inch line. No more multi-core cat mess. One high temperature cat. One smooth path. The cast stainless transition is engineered to flow clean. The 2.5 inch outlet bolts to your existing front pipe with no hassles. You're not fighting weird fitment issues or needing custom fabrication. Bolt it on and you're done. The manifold stays. The cat stays legal. But now the exhaust flows like it should.

Built Right - Not Some Cheap Knockoff

This is 304 stainless steel. The tubing. The transition. The outlet. All stainless. Every weld is TIG welded with argon back gas to eliminate impurities and make sure the welds last. The cast transition was designed in 3D and verified to fit right. You're not getting loose bolts or gaps that trash the flow. We've seen people buy cheap downpipes and they warp after a year of hard driving. The welds crack. The thing becomes a problem. Don't do that. The RV6 downpipe is built solid.

Real Power Gains - Not Just Dyno Numbers

You're getting a noticeable bump in horsepower and torque with this downpipe. How much depends on what else you've done. Stock K20C2 with just this downpipe. You're looking at 10-15 hp depending on your setup. Already got a tune and an intake. You're still gaining real power but the number depends on what you've already done. Either way you're getting sharper throttle response. The exhaust flows cleaner. The engine pulls harder. You feel it when you drive. We've seen people put this on and immediately notice a difference. The car responds quicker. That's what happens when you fix the exhaust restriction.

What You Get
- RV6 Performance catted downpipe
- Fits 2016-2021 Honda Civic 2.0L K20C2
- 304 stainless steel throughout
- 300 cell high temperature cat
- 2.5 inch outlet
- Smooth cast stainless transition
- TIG welded and argon back gassed
- Available in no coating, black ceramic, or silver ceramic
- Installation studs
- Flanged lock nuts
- Flange bolt
- OEM-style gasket
- Wire harness
Note: RV6 Performance catted downpipe for 2016-2021 Honda Civic 2.0L K20C2 sedan and coupe. 304 stainless steel construction with 300 cell high temperature cat. 2.5 inch outlet. Smooth cast stainless transition. TIG welded with argon back gas. Bolts directly to existing front pipe. Replaces factory integrated manifold/cat setup with cleaner single-piece layout. Improves exhaust flow and reduces backpressure. Real horsepower and torque gains (10-15+ hp depending on engine modifications). Better throttle response. Sharper acceleration. Includes installation studs, flanged lock nuts, flange bolt, OEM-style gasket, and wire harness. Available in no coating, black ceramic, or silver ceramic finish (ceramic adds 7-14 days to production). Castings and welds covered under 24-month warranty. Cat itself not covered under warranty. Sold as competition-use part - may not be legal on public roads in some areas. One downpipe per order.
2016-2021 Honda Civic 2.0L (K20C2)
2022+ Honda Civic 2.0L (K20C2)
(1) Downpipe
(3) M10-1.25 X 42mm Stud (HSTU00001)
(4) M10-1.25 Flanged Lock Nut (HFLN00002)

(1) M10-1.25 X 20mm Flange Bolt (HFB00002)

(1) Honda Gasket (18115-R40-A01) (GA00001)

(1) Wire Harness

Civic 2022-2026