Capristo Bypass Exhaust Valve Kit for Ferrari 355 1994-1999
Key Features:
OEM Failure Solved
▸ Redesigned Safety-First Mechanism
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Fails Open: Automatically reverts to open position during vacuum/electrical failure
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Prevents Catastrophic Damage: Eliminates risk of engine/header heat damage from backpressure
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No Modifications Required: Direct OEM mounting replacement
▸ Critical Vacuum Specification
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Requires 0.7-0.8 bar (10-12 psi) vehicle vacuum
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Includes vacuum gauge adapter for pre-installation testing
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Low vacuum? Kit includes diagnostic checklist
Complete Kit Includes
✔ Redesigned Bypass Valve (with integrated sealing rings)
✔ Heavy-Duty Solenoid (3x OEM lifespan)
✔ Vacuum Tubing Kit (heat-resistant silicone)
✔ Mounting Hardware (stainless steel)
✔ Installation Guide with vacuum test protocol
Performance & Compatibility
| Feature |
Advantage |
| Vacuum Logic |
Closes with vacuum (reverse of OEM) |
| Remote Ready |
Compatible with CAPRISTO CES-3 module |
| Material Upgrade |
CNC-machined 6061-T6 aluminum body |
| Warranty |
5 years against defects |
Key Technical Notes
⚠️ Mandatory Pre-Installation Check
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Verify vehicle generates 0.7-0.8 bar vacuum
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Inspect all vacuum lines for leaks
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Test solenoid function before final mounting
⚠️ Remote Control Compatibility
Why This Upgrade?
→ Eliminates $8,000+ Engine Repairs: Prevents backpressure-induced heat damage
→ Track-Ready Reliability: Withstands sustained 7,000 RPM operation
→ Period-Correct Appearance: Maintains factory visual aesthetics
→ German Precision: TÜV-tested components
*"The most critical reliability upgrade for any 355 owner" - Ferrari Technical Bulletin*
Fitment Chart:
| Make |
Model |
Year |
Ferrari
|
355
|
1994-1999
|
⚠️ California Proposition 65 Warning:
This product may expose you to chemicals known to the State of California
to cause cancer or reproductive harm.
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We reward enthusiasts who trust us with their major projects. Use these tiered codes at checkout to apply instant savings to your order:
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Fitment Guarantee:
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Avoid the headache of the wrong part. If you are unsure about compatibility, contact us first. If we verify the fitment for your vehicle via email and it doesn’t fit, we will handle the exchange at no cost to you.
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Flexible Returns:
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Unused items in brand-new, original packaging can be returned within 30 days. While standard refunds incur a 25% restocking fee, we will waive this fee entirely if you choose store credit or an exchange for your next upgrade.
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Exclusions:
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To ensure every customer receives brand-new, untampered components, parts that have been installed, modified, or used are non-returnable. Custom builds, special orders, and wheel/tire packages are considered final sale.
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Fitment Guarantee
Fitment guides and tools are helpful—but your car is unique! Some trims and options aren’t always listed, so if you want 100% confidence that a part will fit, our team is happy to double-check for you. We take the guesswork out of your purchase by standing behind our expertise.
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Our Promise:
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