Big Bubba exists because sometimes bigger is better. This piston-style valve is built for large-capacity supercharged and turbocharged engines, including diesels - not for low-boost daily drivers. It uses a 2.0" / 50.8mm piston with Boost-Balance technology and a positive-seal O-ring, runs cap-adjustable spring pre-load, and is offered with 7, 12, 17 and 21 InHg spring options. Australian made from billet aluminum in the Sleeper finish, with an aluminum V-band fitment.
Specifications
| Type | Big Bubba piston-style blow-off valve |
| Fitment | Universal |
| Size | 2.0" / 50.8mm piston |
| Color | Sleeper |
| Body | Billet aluminum |
| Spring | 7, 12, 17 & 21 InHg options - cap-adjustable pre-load |
| Mounting | Aluminum V-band fitment |
Documents: Installation Instructions (PDF)
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
