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  • HF-1051 High Flow Muffler 10" x 51" Type 1 Muffler
  • HF-1051 High Flow Muffler 10" x 51" Type 1 Muffler
  • HF-1051 HF-1051 High Flow Muffler 10" x 51" Type 1 Muffler
Grand Rock

High Flow Muffler 10" x 51" Type 1 with 5" IN/OUT HF-1051

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OEM PRICE $817.00
YOUR PRICE $617.00
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Universal Muffler

HF-1051 High Flow Type 1 Muffler

Horizontal or Vertical Applications


  • High Flow Replacement Muffler
  • Studies Have Shown A Minimum Of 3% Increase In Gas Mileage
  • Replaces 10" Diameter Stock Mufflers
  • Works On All Engines (ISX, 3406E, 14LSeries 60, Etc.)
  • As Quiet As 10" Diameter Stock Muffler When Driving and Accelerating (Not Engine Braking)
  • Faster Acceleration
  • No Turbo Lag
  • Bolt In Design Allows For An Easy Installation
  • 100% Welded Construction
  • Heavy Gauge
  • Aluminized Finish
  • Highest CFM Flow Of Any Muffler
  • Meets Federal & California Sound Levels
  • 10" Body Diameter
  • 5" I.D. Inlet Diameter
  • 5" I.D. Outlet Diameter
  • Shell Length: 44.5" 
  • Overall Length: 51"
  • Sold Individually

Quality Made Product
This HF-1051 high flow replacement muffler works on all engines. It replaces 10" diameter stock mufflers and is as quiet as a 10" stock muffler when driving and accelerating. Studies have shown a minimum of 3% increase in gas mileage. The muffler has faster acceleration with no turbo lag. It has a bolt in design which allows for an easy installation.

The muffler has a heavy gauge 100% welded construction. It has an aluminized finish and the highest CFM flow of any muffler. It meets the federal and California sound levels.

This fuel saver muffler has a 10" body diameter and a shell length of 44.5".

The inlet and outlet diameter is 5" I.D. The muffler is sold individually and has an overall length of 51".

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Warranty Information

Grand Rock 1-Year Warranty

This product is covered by a 1-year warranty from the date of purchase.

In the rare event that a product does not perform as expected, Grand Rock warrants its products against failure due to defects in materials and workmanship for the period specified under Terms and Conditions for the particular part. Grand RockÂ’s obligation under this warranty covers replacement of the failed part, including transportation charges. Grand Rock is not responsible for labor costs. Please note that, due to the higher heat output of Emissions Components, Grand Rock cannot warrant the Chrome Plating for any item installed on any truck made after 2007.

The Length of Warranty for replacement parts provided under warranty coverage is the balance of the warranty period re­maining on the part being replaced. It is important that the customer handles, stores, and installs all products properly. This warranty does not cover failure due to misapplication, misuse, abuse, neglect, rust through and corrosion (muffler), im­proper service practices or non-approved modification. If you have any questions about proper handling, storing or installation do not hesitate to contact Grand Rock.

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