These high-quality flanged copper locking nuts are critical hardware for your vehicle's high-temperature exhaust system. They are used to secure the exhaust manifold to the cylinder head and, on specific engines like the YD25, to mount the dump pipe to the turbocharger. Over time, the constant exposure to extreme heat cycles and vibration causes the original studs and nuts to fatigue, corrode, and stretch. To ensure a lasting, leak-free seal, it is highly recommended to replace these nuts whenever the manifold is removed.
Neglecting to replace old, stressed nuts can lead to serious issues. They can work themselves loose, causing frustrating and noisy exhaust leaks that rob your engine of power and can allow harmful fumes to enter the vehicle's cabin. Even worse, an old stud can snap during re-tensioning, turning a simple gasket replacement into a major repair job that requires drilling and re-tapping the cylinder head.
Fitment & Quantity Guide:
Please Note: In some applications, the flange on these nuts may foul on surrounding components. We also stock a non-flanged version to suit these applications. We also sell studs separately or as complete kits for different vehicles—please see our other listings.
This Navarapart product has been designed and specified by our team to deliver exceptional quality, durability, performance. We are committed to ensuring every Navarapart-branded product meets or exceeds OEM standards and offers exceptional value for our customers.
