Hollow stem valves

Mike Pearson · 07-14-2017, 12:22 PM

I have not had good luck with Manley valves of late. I have lost 2 engines recently due to exhaust valves dropping the head off. What are you using for exhaust valves? 350 super stock engine. Anyone else having this issue?

rx dealer · 07-14-2017, 01:13 PM

Mike, this engine is a 396 LS3 COPO Super Stock engine. I use the extreme duty XH-432 exhaust valves from manley. A friend lost 2 engines ( 396 big block stocker ) using another top brand valve. is it the luck of the draw? who knows. fingers crossed...Luke SS 311

07-14-2017, 12:22 PM	#1
Mike Pearson VIP Member Join Date: Mar 2007 Posts: 2,417 Likes: 597 Liked 1,880 Times in 562 Posts	Re: Hollow stem valves I have not had good luck with Manley valves of late. I have lost 2 engines recently due to exhaust valves dropping the head off. What are you using for exhaust valves? 350 super stock engine. Anyone else having this issue? __________________ Mike Pearson 2485 SS

07-14-2017, 01:13 PM	#2
rx dealer Member Join Date: Mar 2007 Location: Lake Orion, Michigan Posts: 336 Likes: 11 Liked 53 Times in 13 Posts	Re: Hollow stem valves Mike, this engine is a 396 LS3 COPO Super Stock engine. I use the extreme duty XH-432 exhaust valves from manley. A friend lost 2 engines ( 396 big block stocker ) using another top brand valve. is it the luck of the draw? who knows. fingers crossed...Luke SS 311