The Borla CrateMuffler is purpose-built to optimize the sound and power of a specific engine family - here the Chevrolet LS3 6.2L V8. It delivers Borla's aggressive ATAK sound through Polyphonic Harmonizer technology, which uses internal pipes of differing diameters and lengths to create harmonized exhaust notes, and is tuned to reduce or eliminate drone on cataloged applications. Directional flow: the outlet end carries the welded mounting bracket. 3in offset inlet / 3in center outlet on a 6in x 10.34in oval body (14in body, 19in overall). Premium T-304 stainless steel with CNC-accurate construction.
Specifications
| Type | Engine-tuned CrateMuffler |
| Engine | Chevy LS3 6.2L V8 |
| Sound | ATAK (aggressive) - Polyphonic Harmonizer |
| Inlet/Outlet | 3in inlet / 3in outlet |
| Configuration | Offset inlet / Center outlet - directional |
| Body | Oval - 6in x 10.34in - 14in body - 19in overall |
| Material | T-304 stainless steel |
| Part Number | 400958 |
| Warranty | Million-Mile Warranty |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2010-2015 | Chevrolet | Camaro | SS |
| 2008-2013 | Chevrolet | Corvette | Base |
| 2010-2013 | Chevrolet | Corvette | Grand Sport |
| 2014-2017 | Chevrolet | SS | Base |
Shipping
- In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
- Standard, expedited, and overnight options at checkout.
- Oversized items ship by freight and take longer.
- Backordered items ship as soon as stock lands — contact us for lead times.
- International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.
Returns
- 30-day returns on new, uninstalled items in original packaging with all hardware.
- Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
- Installed or used parts can’t be returned — confirm fitment before you install.
- Special orders and custom items are final sale.
- Email us for return authorization before shipping anything back.
Full details: Shipping Policy · Refund Policy
