valve guide wear

[portfolio_slideshow id=37343] As the powerplant of choice for the 2006-2013 Corvette Z06 and 2014-2015 Camaro Z/28, GM’s LS7 is a 427-cubic-inch, 500-plus horsepower monster. It was the first production engine to use forged titanium connecting rods and titanium intake valves, and the only production V8 built by GM with fully CNC’d heads and a 7,100