LS & LT heads, CNC-ported.
The LS is the engine that built this shop, and its heads are where the power hides. We CNC-port every generation — cathedral-port LS1/LS2, rectangle-port LS3, the big LS7 castings, and Gen-V LT1/LT4 — cut on our in-house machine, flow-benched, and documented so the gain is on paper before it touches the dyno. $1,200 a pair, in Nashville or shipped in from anywhere.
Heads we port.
What porting does for the LS family.
Every LS generation leaves flow on the table in a different place. Cathedral-port heads (LS1, LS2) respond dramatically — the factory port geometry was built for economy, not airflow, and a proper CNC program transforms the mid-lift numbers where a street cam actually lives. Rectangle-port LS3 heads start stronger and finish stronger — porting there is about the short-turn and the bowl, where the factory casting gets lazy. The LS7's heads were CNC'd at the factory, which fools people into thinking they're done — they're not; there's honest flow left in the ports GM cut to a production budget.
Gen-V LT heads bring direct injection into the picture, and the LT4's supercharged airflow multiplies every CFM gained. Ported heads on a blower car aren't a luxury — they're the cheapest boost you'll never have to belt-drive. Every set we cut ships with its measured stock-vs-ported flow sheet, and pairs best with a matching tune — or a full build when the goal is bigger than bolt-ons.
Common questions.
Is the LS7 head worth porting if GM already CNC-ported it?
Yes — the factory CNC program was cut to a production budget, not a flow ceiling. Our program picks up real CFM in the bowls and short-turn that GM left behind. We show you the before/after sheet, so it is measured, not claimed.
Cathedral port vs rectangle port — which gains more?
Cathedral-port heads (LS1/LS2) usually see the bigger percentage gain — the factory geometry leaves more on the table. Rectangle-port LS3-style heads start from a stronger baseline but still pick up meaningful flow where it counts, mid-lift and up.
Do I need a cam to go with ported heads?
You will want one eventually — heads and cam multiply each other. But ported heads alone wake up any healthy LS, and we will tell you honestly which order makes sense for your goals and budget.
What do ported heads do on a supercharged LT4?
Multiply. Every CFM the heads gain, the blower leverages — ported LT4 heads are one of the best power-per-dollar moves on a ZL1, CTS-V, or CT5-V Blackwing. Pairs with a pulley and tune for the full effect.
Can I ship my heads to you?
Yes — mail-in is half our porting business. Ship the bare heads, we CNC-port, flow-bench, document, and ship them back with the flow sheet. Call and we will walk you through packaging and turnaround.
Do you replace valves while the heads are off?
Optionally, and we recommend it — every valve we install is stainless with swirl polish, and race-grade Inconel is available on the exhaust side. We never reuse tired OE valves on a fresh port job.
Get your heads flowing.
$1,200 a pair, flow-documented. Drop off at 1035 3rd Ave S, Nashville — or call and we'll set up the mail-in. Optional stainless / Inconel valve upgrades while they're apart.