This Borla bottle/bullet-style resonator drops the sound level of a CrateMuffler by roughly 2-3 dB(A) and also works as a universal resonator in any matching system. The straight-through design lowers tone without degrading performance. 3in center inlet / 3in center outlet on a 4in round body (10in body, 15in overall). Un-notched necks for weld-in installation; T-304 stainless with CFF packing, a reversible design and no logo embossment.
| Type | Bottle/bullet-style resonator |
| Inlet/Outlet | 3in inlet / 3in outlet |
| Configuration | Center / Center - un-notched (weld-in) |
| Body | Round - 4in diameter - 10in body - 15in overall |
| Sound Reduction | ~2-3 dB(A) - straight-through |
| Material | T-304 stainless steel - reversible - no embossment |
| Part Number | 400939 |
Shipping: In-stock orders placed before 4 PM EST ship the same day, with standard, expedited, and overnight options available at checkout. Backordered items ship as soon as our distributor restocks — contact us for lead times. See the full Shipping Policy.
Returns: 30-day returns on new, unused items in original packaging. See the full Refund Policy.
