Straightflow Lambda Sensor Adapter straight Euro4

Description

The Straightflow Euro4 O2 Adapter is a straight stainless steel lambda sensor adapter for correct oxygen (O2) sensor positioning in Euro4 vehicles. Straightflow lists it for modified exhausts with sport catalytic converters, decat pipes, custom downpipes and performance headers, giving a secure mounting point for the sensor without altering the original exhaust layout.

Straightflow Euro4 O2 Adapter Details

• Type: lambda (O2) sensor adapter / spacer, straight
• Designed for: Euro4 vehicles (Straightflow spec)
• Material: stainless steel (Straightflow spec)
• Thread: M18x1.5 standard (Straightflow spec)
• Installation: screws into the existing O2 sensor bung (Straightflow spec)
• Supplier code: SFT-18975 (Straightflow EURO4TMET)
• Make: Straightflow
• Fitment: universal

What Straightflow states

Straightflow says the adapter has a standard M18x1.5 thread that fits most factory oxygen sensors used in Euro4 vehicles, with CNC precision machining for accurate thread engagement and sealing against exhaust leaks. The stainless steel resists corrosion and extreme exhaust temperatures, including in turbocharged and high-performance street builds.

Straightflow says the adapter screws directly into the existing oxygen sensor bung and the O2 sensor then installs into the adapter, with no permanent modification. The straight version keeps factory-style sensor orientation and suits layouts with enough clearance around the exhaust manifold or downpipe. Angled 45 and 90 degree versions are also listed for tighter spaces.

Fitment

This adapter is listed for Euro4 vehicles but has no specific car list. Check your emissions standard and the space around the sensor port before ordering the Straightflow Euro4 O2 Adapter.

The adapter fits between the sensor port and the O2 sensor, so plan the job with your installer. If you are asking us about the Straightflow Euro4 O2 Adapter, quote the supplier code so we can match the exact item.

Related Straightflow parts

See also: Straightflow Lambda Sensor Adapter straight Euro5, Straightflow Lambda Sensor Adapter straight Euro6, Straightflow Lambda Sensor Adapter 90degree Euro4.

Confirm exact vehicles on the Fitments tab before ordering.