Specifications
- Brand
- Big Gun
- Part #
- 31-RC5
- UPC
- 31-RC5

Big Gun 15in x 1in 7/8in Race Core
$19.85
Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.
Big Gun 15in x 1in 7/8in Race Core for EVO and ECO Series mufflers.
Key Features
- Fits Big Gun current-style EVO and ECO Series mufflers with a 15 inch overall body length.
- Features a 1-7/8 inch straight-through diameter for improved exhaust flow.
- Constructed with a 304 stainless steel perforated core for durability.
- Total core length is 13-1/4 inches.
- Requires 1-7/8 inch diameters on both the inlet and end tip sides for proper fitment.
Product Details
This is the Big Gun 15-inch Race Core, designed as a replacement part for their EVO and ECO Series powersports mufflers. If you're looking to refresh the internals of your existing Big Gun muffler, this core is what you need. It's a straight-through design, meaning it offers minimal restriction for exhaust flow, which is key for performance.
The core itself is made from 304 stainless steel, a well-built material that holds up well against exhaust heat and corrosion. It measures 13-1/4 inches in total length and has a 1-7/8 inch diameter. It's important to measure your old core, as some older mufflers used different diameters on the inlet and end tip sides, and this replacement core requires 1-7/8 inch diameters on both ends.
This race core is intended for use with Big Gun mufflers that have a 15-inch overall body length, not including the removable end tip. It's a straightforward replacement part for those seeking to restore or modify the performance characteristics of their Big Gun exhaust system.
Specifications
- Brand
- Big Gun
- Manufacturer Part #
- 31-RC5
- UPC
- 31-RC5
Frequently Asked Questions
Big Gun 15in x 1in 7/8in Race Core
