6.1L SRT8 head porting.
First-gen SRT8 Hemi — ports opened, fresh valve job for real top-end.
What this head actually flows.
Intake flow at 28″ — ported figures measured on our SF-1020 bench; stock shown against a conservative published baseline.
| Valve lift | Stock | Carma CNC | Gain | % |
|---|---|---|---|---|
| 0.200″ | 150 | 166 | +16 | +11% |
| 0.300″ | 218 | 252 | +34 | +16% |
| 0.400″ | 270 | 310 | +40 | +15% |
| 0.500″ | 298 | 342 | +44 | +15% |
| 0.600″ | 312 | 360 | +48 | +15% |
| 0.700″ | 315 | 373 | +58 | +18% |
Peak gain lands at 0.700″ lift: 315 CFM stock to 373 CFM ported. Low lift stays close to stock (+16 CFM at 0.200″), so the 6.1 SRT8 keeps its street manners and makes its money up high. At 0.700″ it moves 373 CFM against 315 stock.
What we do to it.
First-gen SRT8 Hemi — we open the ports and cut a fresh valve job for real top-end.
Fitment and pricing.
Cars these heads come off.
- 2006–2010 SRT8 — Charger
- Challenger
- 300C
- Grand Cherokee
Valve upgrades for this head.
Offered with the port work on this platform, fitted while the heads are apart.
6.1 SRT8 porting, answered.
What does Carma do to 6.1L SRT8 heads?
First-gen SRT8 Hemi — we open the ports and cut a fresh valve job for real top-end.
What does 6.1L SRT8 head porting cost?
$1,200 for the pair of 6.1L SRT8 heads — both of them, CNC ported on our machine here in Nashville, and the set goes back with its own flow sheet.
Which cars does this fit?
2006–2010 SRT8 — Charger · Challenger · 300C · Grand Cherokee. If your combination is not listed, call us and we will tell you straight whether the head is the right move.
How much more does a ported 6.1 SRT8 head flow?
Peak measured gain is +58 CFM at 0.700″ lift — 315 CFM stock to 373 CFM ported on our SF-1020 bench.
What should I run with ported heads?
Cam, intake, long-tube headers. Heads do their best work as part of a combination, not on their own.
Other HEMI heads we port.
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.