LS1 5.7L head porting.
Cathedral-port LS1/LS6 — the proven recipe. Wakes up a cammed 5.7.
CNC ported in-house in Nashville
Flow sheet with every set
Ship them in or drop them off
$1,200per pair · both heads
Peak flow gain
+57 CFMat 0.600″ lift
Ported peak
303 CFM246 cfm stock
Price
$1,200per pair, CNC ported
Flow data
What this head actually flows.
StockCarma CNC port
Intake flow at 28″ — stock and ported, both measured on our own SF-1020 flow bench.
+57 CFM at 0.600″ lift — 246 cfm stock to 303 cfm ported, the biggest single gain on this head.
The port work
What we do to it.
Cathedral-port CNC with a competition multi-angle valve job and new stainless valves — 2.02″ intake / 1.57″ exhaust. The repeatable recipe that wakes up a cammed 5.7.
The spec
Fitment and pricing.
Engine
Chevrolet LS1 5.7L
Configuration
Pair (both heads)
Fits
1997–2004 Corvette · 1998–2002 Camaro / Firebird · GTO · LS swaps
Best paired with
Cam, intake, 1¾ long-tube headers. Street or strip.
Price
$1,200 per pair
Related
The rest of the combination.
Ship them in or drop them off.
Heads can come to us on a pallet or still on the car. Tell us the combination you are building and we will tell you honestly whether porting is the right next step for it.