Speedmaster Aluminum Heads
I have run both heads. The Stealth needed more work out of the box, seats and chamber. The Speedmaster seemed to be finished better, just needed some blending. All said and done I have about $400 more into the Stealths. If your goal is 450-550 HP you cant go wrong with either. If you want more horsepower start with a better head. The 440 with Stealth heads and a Comp XE275HL dynoed at 502 HP. Heads had seats recut, milled .020 and lightly ported and polished.
I have run both heads. The Stealth needed more work out of the box, seats and chamber. The Speedmaster seemed to be finished better, just needed some blending. All said and done I have about $400 more into the Stealths. If your goal is 450-550 HP you cant go wrong with either. If you want more horsepower start with a better head. The 440 with Stealth heads and a Comp XE275HL dynoed at 502 HP. Heads had seats recut, milled .020 and lightly ported and polished.
