Radium IACV Spacer Kit — Nissan S14 / S15 Silvia (SR20DET)

This Idle Air Control Valve (IACV) Spacer Kit is designed for the SR20DET engine in the Nissan Silvia S14 and S15. The OEM 2-bolt IACV bypass hard line is replaced by this anodized aluminium spacer to gain the necessary clearance for top-feed fuel rail installation. An anodized aluminium barb adapter and rubber hose are included to reroute the charge pipe hose externally around the manifold.

Suits:

• Nissan Silvia S14 — SR20DET
• Nissan Silvia S15 — SR20DET

Kit Includes:

• 1x Anodized aluminium IACV spacer, laser-etched
• 1x Anodized aluminium barb adapter fitting
• 1x Radium 18-0014 IACV gasket (Nissan)
• 1x OEM-style spring action hose clamp
• 1x Rubber hose, 1/2" ID, 2 ft length
• 3x Stainless steel M6x1mm bolts

Specifications:

• Application: Replaces OEM 2-bolt IACV bypass hard line
• Purpose: Clears top-feed fuel rail installation on SR20DET
• Material: Anodized aluminium (spacer and barb adapter)
• Finish: Laser-etched
• Hardware: Stainless steel M6x1mm bolts

Available Part Numbers:

• 20-0162 — IACV Spacer Kit, Nissan S14 / S15 SR20DET

Why Radium Engineering?

• ✅ Manufactured in the USA to motorsport-grade tolerances
• ✅ CNC-machined anodized aluminium spacer with laser-etched finish for precision fit and durability
• ✅ Trusted by tuners and race teams running high-power SR20DET builds worldwide
• ✅ Bolt-on fitment — replaces OEM IACV hard line to clear top-feed fuel rails without cutting or fabrication
• ✅ Compatible with E85, ethanol, methanol, pump petrol, and flex fuel sensor integration