Remark RK-C2076H-09 Sports Touring Cat-Back Exhaust + Front Pipe 23-25 FL5 Type

Vehicle Fitment

• 2023-2025 Honda Civic Type R (FL5 Chassis; K20C1 2.0L Turbocharged; All Trims)

Fitment Notes

• This system is not compatible with the OEM factory front over pipe. The RK-C2076H-09 includes a custom 3" stainless steel front over pipe with high-quality flex tube that replaces the factory front over pipe entirely. This is a deliberate design choice: the factory front over pipe uses a triangle flange configuration that forces competing cat-back systems into a step-down transition below 3" to bolt to the OEM flange. Remark eliminates this restriction by replacing the factory piece with a true full-3" section, but as a result the OEM front over pipe must be removed and the Remark front pipe installed for this system to fit.
• This is a full cat-back system including the front over pipe - coverage extends from the catalytic converter/downpipe flange all the way rearward through the midpipe, resonator, muffler, and dual exit tips. It is a 4-piece design.
• This is the stainless steel variant (-09). The full GR2 titanium cat-back with SUS304 stainless front pipe is available as RK-C2076H-09T, and the Ti-Spec variant as RK-C2076H-09TS. All share the same fitment, piping diameter, and system layout; the material specification and weight are the primary differences.
• The dual-exit Sports Touring layout (RK-C2076H-09) is the standard and most refined sound-character option in the Remark FL5 cat-back lineup. Remark also offers a triple-tip Sports Touring variant (RK-C3076H-09) and a Q-Spec triple-tip variant for FL5 owners who want a more aggressive exhaust note or the factory triple-tip visual appearance retained.

Features

• True full 3" diameter throughout - the complete system maintains a consistent 3" pipe diameter from the catalytic converter/downpipe flange all the way to the muffler exit, with no reducers or step-down transitions at any point; this is the critical differentiating feature of the RK-C2076H-09: achieving it requires the custom 3" front over pipe included in this kit, since any system that retains the factory front over pipe must accommodate the OEM triangle flange geometry, which forces a section below 3"; the uninterrupted 3" bore maximizes flow velocity and cross-sectional area throughout the entire system, removing a primary restriction in the K20C1's exhaust path
• Straight-through resonator and muffler - both the resonator and muffler sections are designed with a straight-through internal flow path; this maximizes flow efficiency through both components while still providing the acoustic tuning necessary to produce the Sports Touring's characteristic deep, sporty exhaust note; the straight-through design minimizes the turbulence and back pressure that conventional reverse-flow or chambered muffler designs create at the expense of flow efficiency
• 3" stainless steel front over pipe with flex tube - the included front over pipe completes the full-3" system from the catalytic converter forward; the high-quality flex tube section in the front pipe provides the thermal expansion compliance and NVH isolation necessary in this section of the exhaust, which experiences significant heat cycling and vibration from the K20C1's turbocharger and drivetrain mounting; the flex tube isolates the system from driveline vibration that would otherwise transmit into the exhaust piping and create resonance
• T304 stainless steel construction throughout - all piping, the resonator, muffler canister, front pipe, and tip assemblies are fabricated from T304 stainless steel, providing long-term corrosion resistance in the heat-cycling, moisture-exposed, and salt-exposed undercarriage environment; stainless steel exhaust components maintain their structural integrity and surface appearance over the life of the vehicle without the internal rust perforation, exterior scaling, and discoloration that affects aluminized steel and lower-grade materials
• Mandrel-bent piping - all bends in the system are formed using a mandrel bending process that preserves the full 3" internal diameter through each curve; conventional press or crush bending deforms the pipe wall at the bend radius, reducing the cross-sectional area and creating a flow restriction; mandrel bending eliminates this, ensuring the full bore is maintained at every transition in the system layout
• Hand TIG welded - all joints, flanges, tip attachments, and the resonator and muffler canisters are hand-welded using the TIG process; TIG welding provides stronger, more precise, and fully sealed welds compared to MIG welding, and produces the clean bead appearance that Remark's products are known for in the import performance community; fully sealed welds eliminate the exhaust leak points that develop at porous MIG welds as thermal cycling fatigues the joint over time
• Performance-focused with daily driver comfort - the Sports Touring designation in Remark's lineup identifies systems engineered for enthusiasts who want a meaningful performance and sound improvement over stock without the excessive volume, drone, or morning-noise issues that come with track-focused or resonator-delete systems; customer reviews on Remark's own product page describe the sound as improved and sporty without being intrusive or drony, suitable for long drives and normal daily use
• Designed for the K20C1 turbocharged platform - the system layout and sizing are optimized for the FL5's 2.0L turbocharged K20C1, which benefits substantially from reduced back pressure in the cat-back section; the turbocharger's compression stage amplifies the benefit of reduced exhaust restriction compared to naturally aspirated engines, with the pressure drop across a larger-bore, straight-through system translating more directly into reduced pumping work at the engine

Specifications

• Part Number: RK-C2076H-09
• System: Sports Touring Cat-Back + Front Over Pipe
• Fitment: 2023+ Honda Civic Type R (FL5; K20C1)
• System Coverage: Full cat-back from catalytic converter/downpipe to tips (4-piece)
• Piping Diameter: 3 in. (true full 3", no reducers)
• Piping Material: T304 Stainless Steel, mandrel bent
• Front Over Pipe: 3 in. T304 Stainless Steel with flex tube (included; replaces OEM)
• Muffler Material: T304 Stainless Steel (straight-through design)
• Resonator: T304 Stainless Steel (straight-through design, included)
• Tip Material: T304 Stainless Steel
• Welding: Hand TIG welded
• OEM Front Over Pipe Compatibility: Not compatible - OEM front pipe must be removed
• Pieces: 4-piece system

Included Components

• 3 in. T304 stainless steel front over pipe with flex tube (replaces OEM front pipe)
• Midpipe/resonator section (3 in. T304 stainless steel, straight-through)
• Muffler canister (T304 stainless steel, straight-through)
• Dual stainless steel exit tips
• Mounting hardware and flange gaskets

Product Description

The Remark RK-C2076H-09 is the Sports Touring Cat-Back Exhaust with Front Over Pipe in stainless steel for the 2023+ Honda Civic Type R (FL5). It is Remark's foundational FL5 cat-back system - a full 3" true-diameter exhaust from the catalytic converter all the way to the dual exit tips, with no step-downs, reducers, or compromised sections anywhere in the layout. Achieving this required designing a custom 3" front over pipe with flex tube to replace the factory piece, since the OEM front over pipe's triangle flange forces competing systems that retain it into a sub-3" section to mate with the OEM geometry.

The system is built around straight-through resonator and muffler sections in T304 stainless steel, mandrel-bent piping, and hand TIG welding throughout. The Sports Touring designation positions this system for FL5 owners who prioritize both performance improvement and daily usability - the straight-through design maximizes flow efficiency through the K20C1's exhaust system while the resonator and muffler provide sufficient acoustic tuning to keep the exhaust note deep and sporty rather than raspy or droning at cruise RPM. Customer reviews from early installations describe a clear improvement over the stock exhaust note that remains comfortable for extended highway driving.

The full titanium variant (RK-C2076H-09T) and Ti-Spec variant (RK-C2076H-09TS) are available for owners seeking maximum weight reduction; the titanium cat-back with SUS304 stainless front pipe weighs 26 lbs for the complete system including the front pipe. The stainless steel RK-C2076H-09 is the more accessible entry point into the Remark FL5 Sports Touring system. Remark also offers the triple-tip Sports Touring variant (RK-C3076H-09) for owners who want to retain the factory triple-tip visual aesthetic while upgrading to a true 3" system.