Check the listing for details. Caterpillar 3406 Std. Exhaust Valve Insert Qty. 1 P/N 391925 Ref.# 1W5283 9S9699. Condition: New. Listed at 10.50 USD. New Genuine PAI Valve Insert P/N 391925(Quantity of 1). (Please email us if you need more than what is listed and we can raise the quantity and drop ship). Alternative and other replacement reference part numbers: Caterpillar 1W-5283, 1W5283, 1W 5283, 9S9699, 9S-9699, 9S 9699, 1M 8346, 1M-8346, 1M8346, 4M0386, 4M 0386, 4M-0386, 8M1916, 8M 1916, 8M-1916, 5M1889, 5M 1889, 5M-1889, 9N5254, 9N-5254, 9N 5254, 5S3348, 5S-3348, 5S 3348. Applications: Caterpillar 3400 Series Exhaust Valve Insert(STD). * *PAI p/n 391925 is #8 in the red square in the above diagram. Other parts sold separately, please email for quote. Please Contact us with the Engine Family and the Engine Serial No. and the Arrangement No. if you have any doubt this is the correct part, or please contact your local OEM dealership for correct part # to ensure correct part. Check out my other items! We can also combine orders to save on shipping. If you need any parts not found on our eBay store let us know, we may have the part in store and we don't mind making an eBay page for it. We're an authorized dealer of PAI and Excel products, please let us know if there is any other parts you might need, thanks.