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Reinforced inlet valves HONDA Prelude H22A

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Set of 8 reinforced inlet valves for HONDA Prelude IV and V with the H22A 2.2 VTEC engine.

  • Brands: SUPERTECH, FERREA
  • Engines: H22A1, H22A2, H22A4, H22A5, H22A6, H22A8
  • Dimensions: 35.0 mm, 35.5 mm or 36.0 mm head, 5.48 mm stem
  • Material: black nitride stainless steel (SUPERTECH); FERREA Competition Plus, 6000 and 5000 Series

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152,26 € tax incl.

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  • HONDA engines covered

    The H22A is Honda's 2.2 litre twin-cam, 16-valve VTEC four-cylinder engine, from 185 to 220 hp depending on version. It powers the Prelude IV (BB1, BB4) from 1993 to 1997, then the Prelude V (BB6, BB8) from 1996 to 2001.

    The engine takes 8 Honda 14711-P13-000 inlet valves, with a 35 mm head and a 5.5 mm stem, held by 14781-PR7-A01 collets. VTEC pushed higher, sharper camshafts or stiffer springs load them far more than in stock use.

    SUPERTECH and FERREA reinforced inlet valves

    On every cycle, the inlet valve opens to let fresh air in, comes back to strike its seat and slides in its guide, dozens of times per second at high revs. It runs between 400 and 550 °C, a range where the original chrome-silicon steel drops from 500 MPa at 500 °C to 250 MPa at 600 °C: half of its strength, 50 %, is gone.

    SUPERTECH valves are made from a racing stainless steel of the EV8 family, which keeps 650 MPa at 500 °C and 550 MPa at 600 °C, 30 % and then 120 % more than the original steel; black nitriding makes the stem harder and smoother in its guide. FERREA offers three series: Competition Plus, 20 % stronger when hot and under fatigue, with a seat that lasts 25 % longer, then the 6000 and 5000 Series.

    Both brands make oversizes, with stem and length unchanged: +0.5 mm (35.5 mm head) from SUPERTECH and in Competition Plus, +1 mm (36.0 mm head) from SUPERTECH and in all three FERREA series. The wider head opens a larger passage at the seat, the cylinder fills better and the engine gains power, with the inlet seats cut to the new size.

    Inlet valve technical specification

    Part numberBrandSizeHead ØStem ØLengthGroovesMaterial
    HIVN-1006F-8SUPERTECHStandard35.0 mm5.48 mm106.85 mmBlack nitride stainless steel
    HIVN-1007-8SUPERTECH+0.5 mm35.5 mm5.48 mm106.85 mmBlack nitride stainless steel
    HIVN-1008-8SUPERTECH+1 mm36.0 mm5.48 mm106.85 mmBlack nitride stainless steel
    F1824P*8FERREA Competition PlusStandard35.0 mm5.48 mm106.85 mmStainless, chrome stem
    F1956P*8FERREA Competition Plus+0.5 mm35.5 mm5.48 mm106.85 mmStainless, chrome stem
    F1456P*8FERREA Competition Plus+1 mm36.0 mm5.48 mm106.85 mmStainless, chrome stem
    F6024*8FERREA 6000 SeriesStandard35.0 mm5.48 mm106.85 mmStainless EV8
    F6056*8FERREA 6000 Series+1 mm36.0 mm5.48 mm106.85 mmStainless EV8
    F5506*8FERREA 5000 SeriesStandard35.0 mm5.48 mm106.85 mmStainless, hard chrome stem
    F5507*8FERREA 5000 Series+1 mm36.0 mm5.48 mm106.85 mmStainless, hard chrome stem

    HIVN-1006F-8: flat head, undercut stem under the head and back cut.
    FERREA: part numbers for the H22A1, H22A2 and H22A4.

    Fitting details

    PartHONDA originalReinforced
    Collets14781-PR7-A01KPR-5.5-7A-ST
    Valve stem seals12210-PZ1-004 / 12211-PZ1-004VS-H5.5I-8 / VS1003*8
    Valve guide12204-P13-305GDE-HB55-I-8 / VG1002*8

    The +0.5 mm and +1 mm sizes require the inlet seats to be cut to 35.5 mm or 36.0 mm, a job for the workshop during the cylinder head rebuild.

    The H22A sets its valve clearance with adjusting screws on the rocker arms: after replacing the valves, check it and set it to the manufacturer's values.

    Technical guide

    Our brands

    SUPERTECHSUPERTECH works out of San Jose, California, and has supplied valvetrain parts for racing engines for more than 30 years: valves, springs, retainers and guides. Each part number starts from a specific cylinder head, goes through ultrasound, X-ray and laser checks, then is proven with engine builders, from drag strip to circuit.
    FERREAFERREA Racing Components was born in 1978 in Fort Lauderdale, Florida, from the passion of two engine builders from Argentina. The workshop forges each valve as a single block from steel bar before machining it entirely on CNC; its parts run in NASCAR and drag racing engines.

    How to choose

    The size depends on the condition of the inlet seats and on the filling gain wanted.

    CriterionOption 1Option 2
    SizeStandard size
    35.0 mm head (SUPERTECH or FERREA), for inlet seats still at factory size.    		+0.5 mm or +1 mm oversize
    35.5 or 36.0 mm head: more air in (about 10 to 12 cfm per mm of head). Seats to be cut; also makes up for seats already reground.

    When reinforced valves become necessary

    • Higher-lift camshafts or stiffer springs
    • Raised rev limit
    • Turbo or supercharger fitted
    • Cylinder head rebuilt for circuit, hill climb or rally
    • Original valves marked, worn or already reground

    Compatible vehicles

    ModelEngine codePowerYears
    Prelude IV 2.2 i 16V VTEC (BB1)H22A2185 hp1993-1996
    Prelude IV 2.2 VTi-R (BB1, BB4)H22A1193 hp1994-1997
    Prelude V 2.2 (BB6)H22A / H22A4197-220 hp1996-2001
    Prelude V 2.2 16V (BB6, BB8)H22A2 / H22A4 / H22A5 / H22A6 / H22A8185-200 hp1996-2001
    Prelude V 2.2 VTi-R (BB6)H22A4193 hp1997-1998

    OEM part number (inlet valve): 14711-P13-000

    Important: these sets cover the Prelude H22A engines; the Accord Type-R and Euro R with the H22A7 engine are not covered here, and the 2.3 litre H23A takes other valves.

    Related products

    A rebuilt H22A cylinder head also needs new exhaust valves, available on this page:

    HONDA Prelude H22 exhaust valves →