Description
Overview
The Flowmaster Super HP-2 Muffler in 409SS brings a proven laminar-flow core into a fresh, modern package. Flowmaster took the acclaimed core from the classic HP-2 muffler and wrapped it in a new compact square case, delivering the same performance benefits and moderate exhaust tone drivers expect from a Flowmaster laminar-flow muffler — now with sleek, updated styling that looks as good as it sounds beneath your truck or SUV.
Built as part of the Super HP-2 Series, this muffler is constructed with a durable 409S stainless steel case and finished in high-temperature paint to stand up to the heat and demands of daily driving and towing. With a 2.50 in. inlet diameter and a universal design, it’s engineered to integrate into a wide range of exhaust setups.
Sound & Performance
The laminar-flow core is the heart of what makes this muffler special. It’s tuned to produce a moderate tone — assertive without being overbearing — making it an ideal choice for enthusiasts who want a noticeable upgrade in exhaust character while keeping cabin comfort in check. The compact square case keeps the footprint tight for easier packaging under trucks and SUVs.
Key Highlights
- Proven laminar-flow HP-2 core for moderate, refined tone
- Durable 409S stainless steel case built to resist heat and corrosion
- High-temperature paint finish for lasting protection
- 2.50 in. inlet diameter with universal fitment
- Compact square case with updated, sleek styling
- Backed by Flowmaster’s Lifetime Limited Warranty
Fitment & Configuration
This Super HP-2 muffler features a universal design intended for Truck/SUV applications, giving fabricators and DIY installers flexibility when building or upgrading an exhaust system. The 2.50 in. inlet makes it a strong match for mid-sized exhaust configurations. Please note that exhaust tips are sold separately, so you can pair the muffler with the tip style that best suits your build.
Why the Super HP-2
If you’re after Flowmaster’s signature laminar-flow performance combined with a moderate tone and a cleaner, more compact case, the Super HP-2 Series delivers. The 409S stainless steel construction offers dependable durability, while the high-temperature paint helps maintain its appearance over the long haul. It’s a well-rounded muffler for truck and SUV owners who want proven engineering, refined sound, and modern styling in one package. As with all products carrying a California Proposition 65 warning, please review the applicable notice before installation.
Backed by Flowmaster’s Lifetime Limited Warranty, the Super HP-2 Muffler in 409SS is built to be a lasting addition to your exhaust setup.






