Description
Overview
The Flowmaster Super HP-2 Muffler in 409SS takes the proven laminar core of the classic HP-2 muffler and wraps it in a new, compact square case. The result is the same performance-minded flow you expect from Flowmaster’s laminar-flow designs, now delivered in a sleeker, more modern silhouette that fits neatly under a wide range of vehicles. If you’re building an exhaust that balances real airflow with a purposeful exhaust note, the Super HP-2 Series is engineered to deliver.
Built as a universal-fit muffler, this Super HP-2 features a 2.25 in. inlet diameter and is tuned for 4- and 6-cylinder engine applications. It falls under Flowmaster’s HP-2 Series and carries an aggressive sound character, making it a strong choice for enthusiasts who want their setup to be heard without sacrificing the smooth, laminar flow the HP-2 platform is known for.
Key Benefits
The laminar core is the heart of this muffler, promoting efficient flow while shaping the exhaust tone. Housed in a durable 409 stainless steel case finished in high-temperature paint, the Super HP-2 is designed to stand up to the heat and demands of an active exhaust system. Its compact square case not only looks clean but also helps it tuck into tighter fitment situations where a traditional muffler shape might not work as well.
- Laminar-flow core carried over from the classic HP-2 muffler for consistent performance
- Compact square case with sleek, modern styling
- 409 stainless steel construction with a high-temperature paint finish
- 2.25 in. inlet diameter, universal fitment
- Tuned for 4- and 6-cylinder engine applications
- Aggressive sound level from a member of the HP-2 Series
- Backed by Flowmaster’s Lifetime Limited Warranty
Configuration & Tips
As part of the broader Super HP-2 lineup, these mufflers are offered in multiple case materials and inlet sizes, including a 409 stainless steel case and a polishable 304 stainless steel case, in 2.00 in., 2.25 in., and 2.50 in. sizes. The version detailed here is the 409SS case with a 2.25 in. inlet. Note that exhaust tips are sold separately, so you can pair the muffler with the tip style that best matches your build.
Fitment
This is a universal muffler intended for 4/6 cylinder engine builds, giving fabricators and DIY installers flexibility to integrate it into custom or replacement exhaust routing. Always confirm your inlet and clearance requirements before installation to ensure the 2.25 in. inlet and compact case suit your application. Please note this product carries a California Proposition 65 warning and an Emission Code of 5.
For anyone chasing a cleaner look, dependable flow, and a bolder exhaust note, the Flowmaster Super HP-2 in 409SS is a smart foundation for your exhaust system.
