C5 Corvette American Racing Headers 1-3/4 inch (1997-2004)

Description

C5 Corvette 1-3/4″ American Racing Headers Long Tube Header System (1997–2004)

For 1997–2004 C5 Corvette coupe and convertible owners, the American Racing Headers (ARH) 1-3/4″ long tube header system replaces the factory manifolds and completes the flow path with an X-pipe midsection to the rear-axle connection point, then mates to your axle-back. The result is a cleaner, higher-efficiency exhaust path for the LS platform, sharper throttle response, and a more aggressive tone under load.

Choose Your Configuration (Catted or Catless)

• With high-flow cats (catted X-pipe): severe-duty 300-cell catalytic converters
  • 1997–2000: C5-97134300LSWC
  • 2001–2003: C5-01134300LSWC
  • 2004: C5-04134300LSWC
• No cats (catless X-pipe):
  • 1997–2000: C5-97134300LSNC
  • 2001–2003: C5-01134300LSNC
  • 2004: C5-04134300LSNC

ARH C5 1-3/4″ System – Product Details

• 304 stainless steel construction
• 1-3/4″ primary tubes flowing into 3″ collectors
• Merge collectors with scavenger spikes to improve exhaust velocity
• 3/8″ laser-cut flanges for a warp-resistant, leak-resistant seal
• Hand-ported TIG welded inlets and optimized primary routing for clean fitment
• X-pipe midsection included to complete the system to the rear-axle connection point

Benefits

• More efficient exhaust flow vs. restrictive factory manifolds
• Stronger mid-range pull and sharper throttle response (results vary by setup and calibration)
• A deeper, more aggressive sound character under acceleration
• Built for long-term durability with corrosion-resistant stainless construction

What to Expect After Installation
Expect a more responsive feel when rolling into the throttle and a stronger exhaust presence under load. Catless setups run louder and sharper; catted systems keep the tone aggressive with a more controlled edge.

Technical Specifications

• System type: Long tube headers + X-pipe midsection (mates to axle-back)
• Primary diameter: 1-3/4″
• Collector diameter: 3″
• Collector attachment: Ball-and-socket style connection
• Collector design: Merge collectors with scavenger spikes
• Material: 304 stainless steel
• Flange thickness: 3/8″
• Midsection note: 1-3/4″ midsections use a 2-1/2″ reduction at the flange to connect to the stock system

What’s Included

• Long tube headers (pair)
• X-pipe midsection (catted or catless depending on selection)
• O2 extension harnesses (required to complete the install)
• Install hardware and gaskets
• Band clamps included where applicable

Installation Overview
Direct-fit upgrade with no cutting or welding. Typical install includes removing factory manifolds, positioning headers, installing the X-pipe midsection, aligning the rear-axle connection point, and tightening to spec. A proper ECU calibration is required after installation for best results.

Corvette Compatibility

• Fits 1997–2004 C5 Corvette Coupe & Convertible (5.7L V8 platform)

What Customers Say

• Fit and routing feel purpose-built compared to generic header kits
• Stronger pull in the mid-range once calibrated correctly
• Sound becomes deeper and more aggressive without needing a full cat-back swap
• Weld quality and flange sealing are commonly praised on long-term installs

Custom Corvette Accessories is enthusiast-run—focused on correct fitment, fast shipping, and real-world Corvette support.