Discover high-performance exhaust options designed to enhance sound, flow, and efficiency. The following selections cover truck and scooter setups, from deep, aggressive rumble to refined, balanced notes. Each product emphasizes durable materials, straightforward installation, and compatibility with common mufflers and tailpipes.
| Product | Brand | Key Features |
|---|---|---|
| Truck Exhaust Kits – Dual System | Truck Exhaust Kits | Flow II muffler, 2.5″ aluminized tail pipes, hardware included |
| RedCap GY6 Scooter Muffler (Blue) | RedCap | 12″ muffler, 28mm opening, 49mm header-to-header bolt spacing |
| RedCap Scooter Muffler (Red) | RedCap | 12″ muffler, 28mm opening, 49mm header-to-header bolt spacing |
| MBRP S5259AL 4″ Cat Back | MBRP | 16 gauge aluminized steel, welded hangers, 4″ tip included |
| Flowmaster 817674 American Thunder | Flowmaster | Maximum clearance for off-road, HP2 laminar flow, factory hanger locations |
Note: The table highlights core attributes to help compare materials, piping, and mounting. Details vary by vehicle and installation. Always verify fitment with your specific year, make, and model before purchasing.
Truck Exhaust Kits Dual System

The Truck Exhaust Kits option features a Flow II high-performance straight-through stainless muffler and quality 2.5″ mandrel-bent aluminized tail pipes. This setup emphasizes improved exhaust flow and a robust finish, with installation hardware included for a straightforward fit on compatible trucks. The stainless Flow II muffler is designed to deliver a more aggressive note while maintaining durability under tough driving conditions. Expect a balanced tone without excessive drone on highway cruising.
RedCap GY6 Scooter Blue Muffler

This RedCap Blue muffler for GY6-based scooters provides a compact 12-inch muffler length with a 28mm outlet, designed to fit many TaoTao, Jonway, and Kymco 139QMB models. The header-to-header bolt spacing is 49mm, aiding installation alignment. The muffler’s compact profile supports modest weight with a noticeable improvement in exhaust flow and potential tone changes without excessive volume. Suitable for riders seeking a more refined yet lively scooter exhaust note.
RedCap Red Scooter Replacement Muffler

RedCap’s replacement muffler for GY6 scooters mirrors the blue version’s dimensions with a red finish. It features a 12-inch muffler length, 28mm outlet, and a 49mm bolt-to-bolt header spacing, designed to simplify replacement or upgrade on compatible scooter models. The red variant offers a distinct appearance while maintaining practical gains in exhaust flow and potential tone enhancement.
MBRP S5259AL 4″ Cat Back

The MBRP S5259AL Cat Back system is built from 16-gauge aluminized steel and includes welded hangers and a 4″ tip. This setup emphasizes durable construction and straightforward installation, with a focus on enhanced exhaust flow that can contribute to improved horsepower and fuel economy. It is a solid option for drivers seeking a robust, street-legal cat-back configuration with a clear, deep exhaust tone.
Flowmaster American Thunder Cat-back

Flowmaster’s American Thunder Cat-back system emphasizes off-road clearance and performance using HP2 laminar flow technology while preserving factory hanger compatibility. It is designed to deliver a balanced, aggressive tone with improved exhaust flow and a straightforward installation on eligible vehicles. The system aims to maximize performance without compromising everyday drivability, making it a popular choice for enthusiasts who want a bold but controllable exhaust note.
Flowsound 2-Chamber Mandrel-Bent Kit

Flowsound 2-Chamber Mandrel-Bent Dual Kit offers a dual tailpipe setup with 2.5″ mandrel-bent pipes and a single 3″ or dual 2.5″ muffler, depending on configuration. Chrome tips are included, giving a stylish finish. The design emphasizes balanced exhaust gas flow and a pronounced, deep note, suitable for trucks looking for a distinct soundtrack while maintaining warranty-friendly mounting options.
Borla 140085 Cat-Back Exhaust

Borla’s 140085 Cat-Back exhaust is engineered to optimize exhaust emissions and internal power generation, with easy installation and potential fuel economy benefits. Borla systems are known for their high-quality materials and tuned sound profiles that range from refined to aggressive, depending on the vehicle. This option aims to deliver a reliable, performance-focused upgrade with a premium exhaust note.
Buying Guide
- Vehicle compatibility: Verify fitment for your specific year, make, and model, especially when selecting cat-back versus axle-back configurations.
- Material and finish: Aluminized steel offers solid durability at a lower cost, while stainless steel is more resistant to corrosion and typically longer-lasting.
- Sound preference: Consider whether you want a subtle upgrade or a loud, aggressive tone. Muffler design and chamber counts influence the audible result.
- Installation considerations: Some kits include hardware and mounting brackets; others may require additional brackets or gaskets. Check for welding or proper hanger alignment requirements.
- Performance goals: Some systems emphasize horsepower gains and better flow, while others focus on exhaust tone and emissions compliance. Balance your priorities with the expected gains.
- Emission and warranty: Ensure the system adheres to local regulations and does not void vehicle warranties where applicable.
- Maintenance: Stainless steel systems resist corrosion longer but can be pricier. Consider ease of cleaning and replacement availability for parts like mufflers and tips.