HRA Products | Mysite

AMS is proud to be the sole supplier of HRA products

HRA High Performance Valves

HRA valves have been developed with many years of engineering experience in the field of modifying competition motorcycle engines for high performance racing and hard road use.

HRA valves are, in most cases, lighter or equivalent in weight to alternate engine valves.

The HRA range has been manufactured with the highest-grade material.

HRA have sourced high quality 23-8N Stainless Steel forgings, known for durable, high temperature & superior quality surface finish properties for all of our valve range. Forging material will withstand high temperature corrosion, scouring of gasoline, impact resistance and friction from valve seats under the highest working temperatures.

HRA valves are finished with a black Nitride to further enhance performance.

HRA have proven valve strength particularly in high engine speed applications. HRA valves have been used, with excellent results, in all manner of competition racing, including Australian & International Motorcycle Road Racing, Australian LSR Competition and Australian Speedway Events.

___________________________________________________

HRA High Performance Custom Kits

HRA high performance upgrade “kits” are constantly developing. HRA valves are extensively used in HRA Custom Kits, which include HRA camshafts and custom porting.

We understand that high performance improvements, including camshafts require careful set-up to achieve the desired results and enhance & improve engine performance & efficiency.

If HRA High Performance Camshafts or Kits are something you would like further information on, please ask us.

Valve Blanks: “Penny on a stick” light weight competition valve:

Extremely lightweight with extreme performance
HRA Flat Top Head size is oversize, with extra length stem for custom grooves & finish to accommodate most intake & exhaust applications in modern, classic and vintage engines.
HRA can supply as blank valve, or
HRA can custom make valve from your sample to suit most applications from our range of sizes – Please ask for more information
Range of stem sizes available:

Suits guide diameter Head diameter Overall length

4.50mm 38.3mm 130mm

5.00mm 40.3mm 130mm

5.50mm 40.3mm 130mm

6.00mm 43.2mm 130mm

6.50mm 42.9mm 130mm

7.00mm 53.3mm 130mm

8.00mm 55.2mm 130mm

RRP $ 26.00

HRA Valve range to suit your Harley Davidson® engine modification:

HRA M8-Series Inlet & Exhaust Valve:

Oversize valve to suit Milwaukee 8
Will fit on standard inserts
Does not require valve seat replacement
HRA Flat top finish in chamber to raise compression ratio
CARE: ensure valve protrusion is correct, to eliminate potential ticking.
NOTE: Ticking noise from valve clearance error in standard & modified engines, can be eliminated with supply of the HRA shim kit. These shims correct error in valve protrusion. ** Please ask for more information in shim selection.

Part Number HRA M8-4250

Application inlet

Suits guide diameter 6.00mm

Head diameter 42.50mm

Overall length 102.2mm

Part Number HRA M8-3300

Application exhaust

Suits guide diameter 6.00mm

Head diameter 33.00mm

Overall length 102.7mm

RRP $52.00

HRA-H Twin Cam Series Inlet & Exhaust Valve:

Oversize valve to suit HD twin cams 2004/05 upwards
Can be machined onto standard inserts
HRA Flat top finish in chamber to raise compression ratio
Suits high performance modification
Will result in significant performance increase when used in conjunction with raising compression by porting cylinder head.

Part Number HRA H-1980-275

Application inlet

Suits guide diameter 7.00mm

Head diameter 1.980”

Overall length 4.450”

Part Number HRA H-1625-275

Application exhaust

Suits guide diameter 7.00mm

Head diameter 1.575”

Overalllenght 4.550”

RRP $52.00

HRA-H 5/16” Series Valve:

HRA Flat top finish in chamber to raise compression ratio
Suits performance modification for 88CID Series Twin Cam Engines & CVO Twin Cam Engines
Superior quality material & surface finish for hard durable road use.
NOTE: These valves can be supplied to suit several applications, including standard & oversize inlet inserts and can supply for exhaust – Please ask for more information.

Part Number HRA H-1980-312

Application inlet (standard insert)

Suits guide diameter 5/16”

Head diameter 1.980”

Overall length 4.465”

Part Number HRA H-1980-312

Application Inlet (O/S) insert

Suits guide diameter 5/16”

Head diameter 2.075”

Overall length 4.465”

Part Number HRA H-1980-312

Application Exhaust

Suits guide diameter 5/16”

Head diameter As req’d

Overall lenght 4.465”

RRP $52.00

HRA valve range to suit your Triumph® engine modification:

HRA-TR 865 Engine Series Inlet & Exhaust Valve:

Suits 865 Series Engines 2006-onwards
Will suit standard base circle camshafts
HRA Flat top finish in chamber to raise compression ratio
Can be supplied as standard length or for high performance camshaft with ground base circle extended stem
HRA 1712C Camshaft profile – ask us for more information
Will also suit intake for HRA 1552B Land Speed Camshaft profile with shim under bucket – as us for more information.
Fits on standard inserts
For high performance/Competition application

Part Number HRA-TR 3320-55E

Application inlet

Suits guide diameter 5.50mm

Head diameter 33.20mm

Overall length 112.25mm or as standard length

Part Number HRA-TR 2790-55E

Application exhaust

Suits guide diameter 5.50mm

Head diameter 27.90mm

Overall length 110.00mm or as standard length

RRP $52.00

HRA-TR “D” Engine Series Inlet & Exhaust Valve:

Suits D-Series Single OHC Engines 2013 - Current
Fits on standard inserts
HRA Flat top finish in chamber to raise compression ratio
For high performance/Competition application
NOTE: We can supply HRA Stage 1 Kit and Stage 2 Kit cylinder head high performance modification with standard or oversize valves – with or without high performance HRA Camshaft.
– Please ask us for more information.

Part Number HRA-TR 3770-5

Application inlet

Suits guide diameter 5.00mm

Head diameter 37.70mm

Overall length 100.5mm

Part Number HRA-TR 3170-5

Application exhaust

Suits guide diameter 5.00mm

Head diameter 31.70mm

Overall length 101.15mm

RRP $52.00