• 1S78SS - 2-into-1 Stainless Exhaust System with 4" Super Bike Muffler
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1S78SS - 2-into-1 Stainless Exhaust System with 4" Super Bike Muffler

2-into-1 Stainless Exhaust System with 4" Super Bike Muffler

Stainless steel 2-into-1 exhaust system with a 4" Super Bike muffler, featuring stepped 1-3/4" to 1-7/8" head pipes welded to the collector and muffler, plus an advanced inner collector for maximum performance. Hand TIG-welded with partial stainless heat shields, a conical end cap, and removable baffle. Includes 18mm O2 sensor ports with 12mm adapters. Made in the U.S.A.; not for M8 Bagger models (see parts 1800-2539 and 1800-2696 for those fitments).

MSRP: $1,649.95

Part Number / SKU: 1S78SS

Drag Part #: 1800-2556

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Features
  • 2-into-1 headers welded to collector and muffler
  • Stepped 1-3/4" to 1-7/8" head pipes
  • Advanced inner collector for maximum performance
  • Partial stainless heat shields
  • Removable baffle
  • Hand TIG welded
  • 18mm O2 sensor ports with 12mm adapters
  • Made in the U.S.A.
Specifications
  • Product Name: 2-into-1 Stainless Exhaust System with 4" Super Bike Muffler
  • Product Type: Exhaust System
  • Model: Super Bike
  • Configuration: 2-Into-1 System
  • Material: Stainless Steel
  • Units: Each
  • Riding Style: Street
  • Muffler Diameter: 4"
  • End Cap: Conical
  • Catalog Correction: Drag Magazine Feb '25 - Not for M8 Bagger models; for those models see parts 1800-2539 and 1800-2696
Fitments & Compatibility
  • 2018-2021 Harley-Davidson FLHC Heritage Classic 107
  • 2018-2021 Harley-Davidson FLSB Sport Glide 107
  • 2018-2024 Harley-Davidson FLHCS Heritage Classic 114
  • 2022-2025 Harley-Davidson FXLRST Low Rider ST 117
  • 2025 Harley-Davidson FLHC Heritage Classic 117
  • 2025 Harley-Davidson FLHC Softail Heritage Classic
  • 2025 Harley-Davidson FXLRST Softail Low Rider ST
Packaging Info
  • Weight: 23.25 lbs
  • Length: 40.75 in
  • Width: 19.5 in
  • Height: 8.25 in
Emissions Compliance Notice
Certain Bassani products are designed for closed-course competition or off-road use only and are not legal for sale or use on pollution-controlled motorcycles operated on public roads or highways in California or other states that have adopted California emissions standards. It is the buyer's responsibility to verify the legality of any product for use in their state. See our Emissions Compliance page for details.