Radium Fuel Injector Pulsation Damper for OEM Rail - 2015-2021 Subaru STI
Radium Fuel Injector Pulsation Damper for OEM Rail - 2015-2021 Subaru STI
Radium Engineering
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PRODUCT DETAILS
RallySport Direct now carries a great selection of high-performance fueling upgrades and accessories brought to you by Radium Engineering.
Here, you are looking at the OEM Style Fuel Pulse Damper.
The opening and closing of the injectors creates pulses in the fuel rail, which can lead to unstable fuel pressure. This damper should be used (especially with high-flow injectors) in order to achieve a safe and consistent rail pressure.
DETAILS:
- Features a 3/8" NPT male thread with impregnated pipe thread paste
- Cracking pressure: 32.2 psi
- Diaphragm travel: 3.1mm (0.12")
- Diaphragm OD: 35mm (1.38")
- Total spring travel: 11.5mm (0.453")
- Overall height: 44.7mm (1.76")
- Wrench hex size: 22mm
WHY WE CARRY THIS
We only list parts we’d run ourselves or recommend to a friend building a real car. If it feels vague, unverified, or inconsistent, it doesn’t make the cut.
- Fitment-first mindset — no “universal” roulette
- Brand reputation matters — we favor proven manufacturing
- Support that actually responds with real answers
WHAT TO EXPECT
This is the clean path: correct fitment, clean install, and results that match the intent.
- Install-ready experience with correct mounting where provided
- Finish that holds up to real driving, not just photos
- Selections on this page drive the exact fitment shipped
TRUST, BUILT INTO THE PROCESS.
Anyone can list parts. We curate what belongs on a serious build. Our goal is simple: fewer surprises, cleaner installs, and confidence when you hit “Buy.”
Fitment checked
We prioritize vehicle-specific listings and clear selection logic so you’re not gambling on compatibility.
Brand discipline
Proven manufacturing and consistent quality matter more than hype. We bias toward what actually holds up.
Real support
If you have a question, you’ll get a human answer that helps you finish the build — not a copy-paste shrug.
RallySport Direct now carries a great selection of high-performance fueling upgrades and accessories brought to you by Radium Engineering.
Here, you are looking at the OEM Style Fuel Pulse Damper.
The opening and closing of the injectors creates pulses in the fuel rail, which can lead to unstable fuel pressure. This damper should be used (especially with high-flow injectors) in order to achieve a safe and consistent rail pressure.
DETAILS:
- Features a 3/8" NPT male thread with impregnated pipe thread paste
- Cracking pressure: 32.2 psi
- Diaphragm travel: 3.1mm (0.12")
- Diaphragm OD: 35mm (1.38")
- Total spring travel: 11.5mm (0.453")
- Overall height: 44.7mm (1.76")
- Wrench hex size: 22mm
