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Oversized valves designed specifically for the extreme conditions in the MINI Cooper S supercharged motor. +0.5mm Intake and +1.5mm Exhaust valves allows the use of MINI Cooper factory seats and will outperform factory valves when matched to a properly ported head. Includes 8 Intake and 8 Exhaust valves.

Fits the following models:

2002-2006 R50 MINI Cooper and R53 MINI Cooper S Hardtop
2005-2008 R52 MINI Cooper and MINI Cooper S Convertible


These valves do not require oversized valve seats.

The Intake valve has a +0.5mm oversize head made from high nickel alloy 21-4n material, deep stem undercut for higher flow rate, fully machined, swirl polished, close tolerance stem, QPQ black nitride finish provides higher surface hardness with low friction for improved stem wear. Valve seat surface is harder with the nitride layer, resisting corrosion buildup and lasting longer with lead free fuels, alcohols, nitro or other "explosive" mixes. Backcut for improved flow.

The Exhaust valve has a +1.5mm oversize head made from inconel and carbon steel stem material, deep stem undercut for higher flow rate, fully machined, swirl polished, close tolerance stem, QPQ black nitride finish provides higher surface harness with low friction for improved stem wear. Valve seat surface is harder with the nitride layer, resisting corrosion buildup and lasting longer with lead free fuels, alcohols, nitro or other "explosive" mixes. Backcut for improved flow.

Check local regulations on conformity for street use.

Oversized valves for improved flow thru the Head. A set of +0.5mm Intake and +1.5mm Exhaust valves.
For the 1st generation MINI Cooper and Cooper S models including 2002-2006 R50 & R53 Hardtop and 2005-2008 R52 Convertible.
Oversized Performance Valve Set Gen1 MINI Cooper Cooper S R50 R52 R53

Oversized Performance Valve Set Gen1 MINI Cooper Cooper S R50 R52 R53

Oversized Performance Valve Set Gen1 MINI Cooper Cooper S R50 R52 R53

Oversized Performance Valve Set Gen1 MINI Cooper Cooper S R50 R52 R53

Oversized Performance Valve Set Gen1 MINI Cooper Cooper S R50 R52 R53

Oversized Performance Valve Set Gen1 MINI Cooper Cooper S R50 R52 R53

Oversized Performance Valve Set Gen1 MINI Cooper Cooper S R50 R52 R53
Part No: NME6026
$358.99
Qty:
Fits the following:
MINI (2002-Current)
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Oversized valves designed specifically for the extreme conditions in the MINI Cooper S supercharged motor. +0.5mm Intake and +1.5mm Exhaust valves allows the use of MINI Cooper factory seats and will outperform factory valves when matched to a properly ported head. Includes 8 Intake and 8 Exhaust valves.

Fits the following models:

2002-2006 R50 MINI Cooper and R53 MINI Cooper S Hardtop
2005-2008 R52 MINI Cooper and MINI Cooper S Convertible


These valves do not require oversized valve seats.

The Intake valve has a +0.5mm oversize head made from high nickel alloy 21-4n material, deep stem undercut for higher flow rate, fully machined, swirl polished, close tolerance stem, QPQ black nitride finish provides higher surface hardness with low friction for improved stem wear. Valve seat surface is harder with the nitride layer, resisting corrosion buildup and lasting longer with lead free fuels, alcohols, nitro or other "explosive" mixes. Backcut for improved flow.

The Exhaust valve has a +1.5mm oversize head made from inconel and carbon steel stem material, deep stem undercut for higher flow rate, fully machined, swirl polished, close tolerance stem, QPQ black nitride finish provides higher surface harness with low friction for improved stem wear. Valve seat surface is harder with the nitride layer, resisting corrosion buildup and lasting longer with lead free fuels, alcohols, nitro or other "explosive" mixes. Backcut for improved flow.

Check local regulations on conformity for street use.

 
 
Question:
How do these improve flow without cutting the valve seats?
Answer:
If the head has been ported then yes. The flow change on these valves is on the bottom widest part of the valve, not the thinner tops where they would make contact with the seat. https://www.minimania.com/part/NME6026/Mini-Cooper-Valve-Set-Oversized-Gen1-R50-R52-R53

Mini Mania Tech Team

The MINI Cooper Parts and Accessories Experts

 
 
 
 
Question:
Are these just “plug and play”, where I just need to take out the old valves and install the new ones, or is there additional work required to install these? Also, would it remain plug and play with a different camshaft, specifically Part number #NME6041
Answer:
The NME6041 oversized valves were designed to work with the factory valve seats. We recommend an engine shop clean and inspect the head when installing these valves to ensure the valve seats  are to spec, and valve seals are new, and the head is 'true' (not warped).

Mini Mania Tech Team

The MINI Cooper Parts and Accessories Experts

 
 
Recommended items for: NME6026
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