We tested this on a 2021 S4 (3.0T), Hybrid turbos (TSH), full E85.
The "Seat of Pants" Difference: The top-end doesn't fall off. On the old pump, power peaked at 6,200 RPM. With v9049, it pulls linearly to 7,400 RPM. It feels like a naturally aspirated motor—right up until the torque hits.
This is the silent hero. The old valve could get stuck partially open if you ran low-quality fuel filter media. v9049 uses a billet cage with a ceramic ball. It seats faster. Result: Hot starts on E90 are now 0.5 seconds faster. Minor, but critical for daily drivers. apr h4s platinum updated version v9049
The original H4S (and competitors like the Nostrum Stage 2) solved the volume issue. But the platinum series promised better atomization. The problem? Early revisions had a chatter at idle on some ZF8 cars and required a very aggressive break-in procedure.
Enter v9049.
APR doesn’t advertise this widely, but v9049 isn’t a marketing refresh. It’s a hardware re-engineering. The “Platinum” moniker remains, but the guts changed.
In the ever-evolving world of automotive LED lighting, few names command as much respect as APR. Known for bridging the gap between OEM reliability and aftermarket performance, APR has just released a significant update to their iconic H4s Platinum series. The new APR H4s Platinum Updated Version v9049 is here, and it promises to rewrite the rulebook for motorcyclists and classic car owners who rely on the H4 (HB2/9003) platform. We tested this on a 2021 S4 (3
But is this just a marketing rebrand, or is the v9049 a genuine leap forward? We’ve tested the unit, analyzed the spec sheet, and compared it to the previous generation. Here is everything you need to know.