29 Jan Shop CarsGPI SS4 Cam Only LS3 (Stock Heads) Gunning for 9’s!! Posted on January 29, 2019April 16, 2019 by Gwatney PerformanceCheck out this video of Ben Weishaar yesterday – in his “Cam Only” LS3 powered FLOP GEN – running our new SS4 (No Flycut) Camshaft!Can he run a 9 w/ stock heads?! Update 4/15/19: She’s a little faster now… Want to get a GPI SS4 (No Flytcut) camshaft too?Top Seller Camshafts & ValvetrainGPI – LS2 / L76 / LS3 3-Bolt CamRated 5.00 out of 5 $399.00Select options Gwatney Performance Huge L83 & L86 NA Head & Cam Performance Gains (+100rwhp!)LS7 Valve Drop Issue. What you need to know!