Our Twisted Steel long tube header and y-pipe added an astounding +32 HP and +44 lbs. x ft. 

Twisted Steel Long Tube Headers Features:

• 16-Gauge, 1-3/4" Mandrel-Bent Stainless Steel Tubing for Unrestricted Flow
• 3/8" Thick, Laser-Cut, Head Flanges Designed to Match the Head Port for a Leak-Free Seal
• 4-to-1 Formed Merge Collectors Eliminate Flow Blocking Turbulence
• Optimized Tube Lengths Improve Flow and Performance
• 100% Hand MIG Welded Construction Ensures Optimal Strength and Durability

Y-Pipe (Street Version) Features:

• High-Flow, 400 Cell Catalytic Converters for Improved Flow
• Mandrel-Bent 3" into 3-1/2" Stainless Steel Tubing for Better Flow and Added Power
• True 2-to-1 Mitered Merge Collector Eliminates Dead Zones for Improved Flow

In recent testing, the Street Version produced +33 HP and +30 lbs. x ft. TQ on our in-house dyno (tested on a 2014 Toyota Tundra V8-5.7L).

Headers:

• 1-3/4" Primary Tubing Leads into a 3" Collector
• 4-to-1 Formed Merge Collectors Eliminate Flow-Block Turbulences
• Retains Factory Air Injection
• Optimized Tube Lengths Improve Flow and Performance
• 100% MIG Welded for Strength and Durability

Connection Pipes:

• Includes Dual, High-Flow, 400 CPSI Stainless Steel Catalytic Converters
• 3" Diameter Mandrel-Bent Stainless Steel Tubing
• Utilizes OE Mounting Locations