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Turn Up the Turbo Growl Without the Highway Drone
The Thermal R&D B188-C188 is a complete 2.5 inch splitting to 2.25 inch frontpipe back exhaust system built specifically for the 2018 to 2022 Honda Accord Sport with the 1.5T engine. Every B188-C188 system is built in the USA from T304 stainless steel and uses Thermal R&D True Helmholtz Technology to cancel drone at cruising speed while keeping an aggressive, throaty note under acceleration.
Key Features
- Complete 2.5 inch to 2.25 inch dual frontpipe back exhaust system, part number B188-C188
- True Helmholtz Technology cancels interior cabin drone at highway cruise
- T304 stainless steel construction with mill finish piping and a brushed muffler
- Designed to fit within the factory Accord Sport valance and bumper opening
- Direct bolt-on installation, retains every OEM hanger location
- All clamps and hardware needed for the B188-C188 install are included
Fitment
| Year Range | Make | Model | Trim |
|---|---|---|---|
| 2018-2022 | Honda | Accord | Sport 1.5T |
Specifications
| Detail | Value |
|---|---|
| Manufacturer Part Number | B188-C188 |
| Brand | Thermal R&D |
| System Type | Frontpipe back exhaust |
| Pipe Diameter | 2.5 inch splitting to 2.25 inch tailpipes |
| Material | T304 stainless steel |
| Finish | Mill finish front pipe, tubing, and resonator, brushed muffler |
| Drone Elimination | True Helmholtz Technology |
| Country of Manufacture | USA |
| Warranty | Lifetime warranty |
What's Included
- Complete B188-C188 frontpipe back exhaust system, including resonator and muffler
- All mounting hardware and exhaust clamps
- Factory hanger hardware compatibility, no cutting or welding required
About Thermal R&D
Thermal R&D designs and builds every exhaust system in Lancaster, California, with a focus on eliminating the droning resonance that plagues most aftermarket systems. The B188-C188 carries the same True Helmholtz Technology used across the Thermal R&D catalog and is backed by a lifetime warranty to the original vehicle owner.
Related Parts on Our Site
- Thermal R&D B191-C191 Honda Accord 3 Inch Frontpipe Back Exhaust, Polished Tips
- Thermal R&D B191-C191-C Honda Accord 3 Inch Frontpipe Back Exhaust, Ceramic Coated Tips
FAQ
What is the B188-C188?The B188-C188 is a Thermal R&D 2.5 inch to 2.25 inch frontpipe back exhaust system built for the 2018 to 2022 Honda Accord Sport 1.5T, replacing everything from the catalytic converter back with a direct bolt-on setup.
Will the B188-C188 fit my 2.0T Accord Sport?The B188-C188 is designed and tuned specifically for the 1.5T engine. If you have the 2.0T, look for the corresponding 2.0T frontpipe back system instead.
Does installing the B188-C188 require any cutting or welding?No. The B188-C188 is a direct bolt-on system that uses all factory hanger locations, so no cutting or welding is needed during install.
Will the B188-C188 trip a check engine light?No. The system connects behind the factory catalytic converters and does not affect any emissions sensors or components.
How long does the B188-C188 take to install?Most installers complete the B188-C188 swap in under two hours with basic hand tools and a lift or jack stands.
Does the B188-C188 come with a warranty?Yes. Thermal R&D backs the B188-C188 with a lifetime warranty to the original vehicle owner against manufacturing defects.
Is the B188-C188 loud at idle?The B188-C188 uses True Helmholtz Technology to keep idle and cruise volume controlled while still delivering a deeper tone under acceleration.
Can I install the B188-C188 myself?Yes, most Accord Sport owners with basic mechanical experience and standard hand tools can install the B188-C188 at home in a driveway or garage.
Install Instructions
- Raise the vehicle safely and allow the factory exhaust to cool completely before starting the B188-C188 install.
- Loosen and remove the factory exhaust hanger rubber mounts and separate the OEM system at the factory flange.
- Remove the stock exhaust system from the vehicle and set it aside.
- Test fit the new B188-C188 frontpipe section and connect it to the factory flange using the provided hardware.
- Attach the B188-C188 resonator and muffler sections to the factory hanger locations without fully tightening clamps.
- Align the entire B188-C188 system so the tips are centered in the rear valance opening.
- Torque all B188-C188 clamps to spec once alignment is confirmed.
- Start the engine and inspect every joint of the B188-C188 for leaks before lowering the vehicle.
Prop 65 Warning
This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
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