Elevate your Mini Turbo Models, including Cooper S and JCW, with the ALTA BOV Spring Upgrade. This replacement spring offers a cost-effective, high-performance solution for your stock Blow Off Valve (BOV). By holding more boost between shifts, it significantly reduces turbo lag, enhancing overall performance. The carefully designed stiffer spring ensures normal BOV operation while maintaining increased pressure in the boost tubes, preventing power gaps.

• Simple and cost-effective upgrade for improved turbo response
• Reduces turbo lag between shifts, boosting overall performance
• Designed with a custom-made heat-treated 17-7 Stainless Steel Spring
• Rated for over 7,000,000 cycles for long-lasting durability
• Holds and vents up to 40psi efficiently

Designed with precision for BMW Mini Cooper S models equipped with N18 engines, this product is tailored to fit Cooper S vehicles from 2011 onwards and JCW Cooper S from 2013 onwards. Whether you've recently boosted your vehicle's performance through an ECU software upgrade, desire an attention-grabbing Blow off sound, or need a dependable solution to prevent common failures, this product is the perfect choice for you.

Exclusively available in a limited edition Red color option at Turner Motorsport, it's an opportunity to make a bold and distinctive statement with your Mini Cooper S.

Optimize your BMW's performance by adjusting your diverter or blow-off valve using this kit containing four springs with varying strengths. When noticing excessive pressure release or a drop in boost pressure, it's an indicator that a stronger spring might be necessary.

Important Notes:

• Fitting a stronger spring won't increase boost pressure unless there's a pressure loss.
• Installing an excessively strong spring may damage the turbocharger if it restricts the valve's operation.

Valve Spring Color Coding:

• Green: Suitable for 5-15 PSI
• Yellow: Ideal for 15-23 PSI
• Blue: Designed for 23-30 PSI
• Red: Suitable for 30+ PSI

MINI R55 to R59 Upgraded Diverter Valve is designed for Peugeot/BMW MINI 1.6 Turbo engines, found in Peugeot 207/307/308 GT Turbo and BMW MINI Cooper S Turbo R56/57 models. This valve is ideal for vehicles with increased boost pressure from an ECU software upgrade and for unmodified vehicles in warmer climates, providing a solution to common failures. Key features include:

• Suitable for Peugeot/BMW MINI 1.6 Turbo engines
• Perfect for vehicles with increased boost pressure
• Reliable performance in warmer climates
• Reduces the risk of common bypass valve failures
• Enhances engine efficiency and reliability

Optimized for BMW Mini Cooper S N14 Engines

Designed with precision, this product is tailor-made for BMW Mini Cooper S vehicles featuring N14 engines, focusing on Gen 2 Cooper S (2007-2010) and JCW (2009-2012) editions equipped with electronically controlled bypass valves.

Key Features:

• Specifically crafted for N14 engine-equipped BMW Mini Cooper S models.
• Caters to Gen 2 Cooper S (2007-2010) and JCW (2009-2012) variants.
• Ideal for vehicles with boosted pressure due to ECU software upgrades.
• Recommended for unmodified vehicles in warmer climates.
• A reliable solution to prevent common failures.