Buy Online Flowmaster 12018400 HP-2 Muffler 409S - 2.00 Center IN / 2.00 Center OUT 18.00 in. Case

Flowmaster 12018400 HP-2 Muffler 409S - 2.00 Center IN / 2.00 Center OUT 18.00 in. CaseBuy Flowmaster 12018400 HP-2 Muffler 409S - 2.00 Center IN / 2.00 Center OUT 18.00 in. Case

Flowmaster 12018400 HP-2 Muffler 409S - 2.00 Center IN / 2.00 Center OUT 18.00 in. Case Product Description:



  • Stainless 409S case painted
  • Great for street rods/customs/lowrider/sport trucks
  • Patented laminar flow technology - cool shell for reduced radiant heat
  • Compact design
  • Internal components are 409S stainless steel

Product Description

The HP-2 line of mufflers utilize Flowmaster's revolutionary new Hushpower core design and deliver a moderate sound level with a rich traditional tone. Featuring a distinctive narrow case profile, the mufflers utilize Cool Shell Technology which minimizes radiant heat from the muffler body. Perfect for applications such as street rods, customs and rock crawlers that have limited space or can't fit a traditional oval shape muffler. Constructed with stainless steel materials and fully welded for maximum durability.

Customer Reviews

Most helpful customer reviews

0 of 0 people found the following review helpful.
5great 50's rumble
By skyliners2go
I installed two HP2's on my 54 Ford Sunliner convertable and was pleased at the nice low rumble with just the right amout of crack when reved up.Small 239 engine, Big sound,

See all 1 customer reviews...


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Buy Flowmaster 12018400 HP-2 Muffler 409S - 2.00 Center IN / 2.00 Center OUT 18.00 in. Case