Driver Side 185CC As-Cast Street Hawk Cylinder Head By Air Flow Research

If your HEMI’s factory heads are feeling a little… tired, give ’em the old switcheroo with this Driver Side 185cc As-Cast Street Hawk Cylinder Head from AFR. This head isn’t just a replacement—it’s a glow-up for your Gen III HEMI. Built from tough A356 aluminum using permanent-mold tech (which sounds fancy because it is), this unit is ready to take on boost, power, and your buddy’s bad opinions.

AFR gave this cylinder head a .750” thick deck, so it laughs in the face of high compression and forced induction. We’re talking race-ready structure with street-level chill. The improved coolant jacketing helps keep things cool under pressure, so your engine won’t sweat when you mash the loud pedal. And yes, it’s got CNC-machined chambers and a 5-angle valve job so clean it could moonlight as a barber.

It’s designed for hydraulic roller cams up to .600” lift, and yes—you can even machine it to play nice with a Hellcat supercharger. Because why not?

You’ll also get PAC Racing springs, beefy chrome moly retainers, bronze guides, and Viton valve seals—basically everything but the kitchen sink (and honestly, we tried).

Heads up: This is the driver side only, so if your passenger side is jealous, better order two.

Test conducted at 28″ of water (pressure) on Superflow 1020
Bore Size: 4.060″, 3/4″ radius plate exhaust, 1 3/4″ curved pipe