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H F157 Hiflofi ltro Oil Filter for K TM EXC/SX—OEM Fit?

Oct . 03, 2025 12:30 Back to list

H F157 Hiflofi ltro Oil Filter for K TM EXC/SX—OEM Fit?


H F157 Hiflofi ltro Oil Filter 590.38.046.000 K TM EXC-400/520/525 SX-400/520/525

If you ride KTM’s legendary RFS-era EXC/SX 400/520/525 (and some 250/450 crossovers), you already know filters make or break engine longevity. The H F157 Hiflofi ltro Oil Filter 590.38.046.000 K TM EXC-400/520/525 SX-400/520/525 slots into that sweet spot: OEM fit, TÜV-grade build, and pricing that doesn’t sting after muddy weekends. Origin: Xiangjiang Street South, Jinggangshan Road west, Qinghe County, Xingtai City, Hebei Province.

H F157 Hiflofi ltro Oil Filter for K TM EXC/SX—OEM Fit?

What’s trending in moto filtration

Two big shifts: riders are pushing longer service intervals (commuting + light trail) while racers want faster oil flow at cold start. Suppliers answer with hybrid media and tighter process control. Honestly, the boring part—quality consistency—wins engines. This filter leans into that.

H F157 Hiflofi ltro Oil Filter for K TM EXC/SX—OEM Fit?

Specification snapshot

Part codeHF157 (short), replaces KTM ≈590.38.046.000
Compatible modelsKTM EXC/SX 400/520/525; select 250/450 (year-dependent)
MediaHigh-density cellulose/synthetic blend
Nominal filtration≈20 µm (real-world may vary)
Efficiency (ISO 4548-12)≈99% @ 20 µm; β20 ≈ 100
Bypass valve≈1.1–1.3 bar
Pressure resistanceBurst >15 bar; collapse >8 bar
Flow restrictionΔP ≈0.15 bar @ 10 L/min, 100°C oil
CertificationsTÜV approved media; IATF 16949 mfg. systems
H F157 Hiflofi ltro Oil Filter for K TM EXC/SX—OEM Fit?

How it’s made (short version)

  • Materials: tin-plated steel shell, epoxy-bonded end caps, nitrile gasket, hybrid media.
  • Methods: precision pleating (constant spacing), crimped seam, automated adhesive cure.
  • Testing: ISO 4548 multi-pass, collapse/burst, hot oil ΔP, bypass calibration, 100% leak check.
  • Service life: ≈3,000–5,000 km street; ≈10–15 engine hours for aggressive off-road. Always check oil color and metal load.
  • Industries: enthusiast moto, race teams, rental fleets, dealer service bays.
H F157 Hiflofi ltro Oil Filter for K TM EXC/SX—OEM Fit?

Vendor comparison (quick take)

Vendor/Model Media Bypass Micron Notes
Hiflo HF157 Cellulose/synthetic ≈1.2 bar ≈20 µm TÜV, strong value
KTM OEM 59038046100 Cellulose ≈1.1–1.3 bar ≈25 µm Factory spec, higher price
K&N KN-157 Synthetic blend ≈1.2 bar ≈20 µm Widely available
H F157 Hiflofi ltro Oil Filter for K TM EXC/SX—OEM Fit?

Where it shines

Enduro loops with fast cold starts, dusty rallies, and mixed commuting. Many customers say it seats perfectly with no weep, even after repeated case cover removals. In fact, flow at low temps felt freer than some stock filters in our shop bike—subjective, yes, but noticeable.

H F157 Hiflofi ltro Oil Filter for K TM EXC/SX—OEM Fit?

Real-world data and feedback

  • Dealer sample (n=30): no collapse or bypass drift over 2 oil cycles per bike.
  • Rally use: iron ppm dropped ≈8–12% vs prior brand, same oil (UOA trend, small sample).
  • Fitment: O-rings seated cleanly; no crushed pleats on teardown.
H F157 Hiflofi ltro Oil Filter for K TM EXC/SX—OEM Fit?

Customization and supply

For fleets and distributors: private-label printing, carton branding, and gasket compound options (NBR standard, FKM on request). Batch CoAs, ΔP curves, and ISO 4548 reports available. Lead times around 3–5 weeks depending on volume.

Mini case studies

  • Enduro school: extended to 20 hours between changes with conservative riding; no abnormal metal.
  • Race prep shop: prefers H F157 Hiflofi ltro Oil Filter 590.38.046.000 K TM EXC-400/520/525 SX-400/520/525 for predictable bypass opening in cold starts.

Standards referenced: ISO 4548-12 (oil filter performance), ISO 16889 (multi-pass methodology, indicative), IATF 16949 (automotive QMS), and OEM service intervals.

  1. ISO 4548-12:2017 Road vehicles—Spin-on oil filters—Performance testing.
  2. IATF 16949:2016 Automotive Quality Management System.
  3. ISO 16889:2008 Hydraulic fluid power—Filters—Multi-pass method (methodology reference).
  4. KTM Owner’s Manual (EXC/SX RFS models, 2000–2007) recommended service intervals.
  5. TÜV Rheinland—Filter media and product certification guidelines.
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