TSP PRC 260cc CNC Ported LS3/LS2/L99 Style 6-Bolt Cylinder Heads PAIR w/ TSP .660" Spring Kit and Titanium Retainers
All Precision Race Components (PRC) cylinder heads come fully CNC-ported and machined using state-of-the-art technology!
PRC cylinder heads are extensively researched and tested. These aftermarket LS3 castings flow significantly more than a GM ported casting while keeping port sizes smaller for improved port velocity. The result is smaller-than-stock LS3 ports that move more air than any other LS3 cylinder heads.
The 13-degree valve angle allows higher compression and larger camshafts thanks to additional piston-to-valve clearance.
MADE IN THE USA!!
CAST IN THE USA!!
MACHINED IN THE USA!!
Features:
- NEW PRC 13-Degree Valve Angle LS3 Castings
- Improved piston-to-valve clearance for extra compression & larger camshafts
- Smaller than stock intake port volume for improved port velocity
- Fully CNC'd Intake, Exhaust and Chamber
- 3/4" Deck Thickness
- Will accept up to 1/2" Cylinder Head Hardware
- Stainless steel hollow stem 2.185" intake valves & stainless steel 1.60" exhaust valves
- Integrated rocker pedestals
- TSP .660" Spring Kit with PAC Valve Springs & Titanium Retainers
- CHE Bronze Guides
- Completely assembled in the USA
- 68cc combustion chambers
- Minimum Bore Dia 4.000"
260cc 6-Bolt LS3 Flow Data
|
| Lift |
Intake Flow
|
Exhaust Flow
|
| .200" |
157 cfm
|
117 cfm
|
| .300" |
224 cfm
|
170 cfm
|
| .400" |
279 cfm
|
205 cfm
|
| .500" |
329 cfm
|
225 cfm |
| .600" |
360 cfm |
235 cfm |
| .650" |
372 cfm |
240 cfm |
| .700" |
380 cfm |
243 cfm |
