Harley-Davidson Nightster Special RH975S Catalytic Converter
New, used, or aftermarket – from sellers across Europe.
Parts availability
Limited availability – hank searches the web for you.
Estimated price range
Widely available Limited Hard to find
Last updated: 30.09.2026, 01:12
Catalytic Converter for your Harley-Davidson Nightster Special?
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Find Harley-Davidson Nightster Special RH975S parts online
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About this part
The catalytic converter on your Nightster Special RH975S converts the pollutants in the exhaust and decides whether the emissions test passes. Rattling when pulling away, a loss of power from blocked ceramic or a lambda control fault all call for replacement.
Frequently asked questions
What should I check when buying a catalytic converter for the Harley-Davidson Nightster Special?
Emissions standard, engine code and flange dimensions of your Nightster Special RH975S matter, because a converter for the wrong standard never brings the sensors into their control range. Look for a valid approval number on the housing and check that the lambda sensor bosses and heat shield are there.
A used original converter or an aftermarket one?
A used original fits without surprises and keeps the vehicle's approval, but tap it first to hear whether the ceramic has come loose. Aftermarket converters cost less yet need the matching approval, otherwise the roadworthiness test turns into a problem.
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