- 2.00"intake valves/1.55" exhaust valves, Manley springs.
- 269 CFM flow rate @ .525" lift. Max. recommended lift .550".
- Milled .030".
- Optional Stainless Steel undercut valves $200 additional
Stage 1 (40 hp gain) $999
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Stage 2 (75 hp gain) $1650
- 2.08" intake/1.60" exhaust valves with undercut stems.
- Manley 1.46" OD dual springs (see caution below)
- 300 CFM flow rate @ .600VL" with LS6 and 6L heads.
- Milled .030" for increased CR.
Titanium retainers, new seats, 10 ° locks.
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Stage 3 (100 hp gain) $1900
- Stainless Steel 2.125" intake/1.6" exhaust valves
- Manley 1.43" OD springs and 10 ° titanium retainers (for cams of .650" or less). For more lift, let's talk.
- 329 CFM intake flow rate @ .750" , 246 CFM exhaust flow.
Although not thought of as a street head, it can be used on a street driven car. Recommend big bore and valve relieved pistons.
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Stage 1 (25 hp gain)
- Stock valves, 1.25" OD Springs and 7° retainers, 110 lb. seat pressure.
- 225 CFM intake @ .500 VL, 168 CFM exhaust flow.
- Clean-up cut on deck, new stem seals.
$1000 if guides are needed.
$1100 if guide plates and studs are needed.
Port matching of intake manifold is recommended ($150 extra, includes cleaning.)
- Stage 3 heads can be built.
- LT4 possibilities exist.
- AFR bare heads can be prepped to your specs.
- Stainless 2.05" intake and 1.57" exhaust valves
- Manley 1.43" OD springs and 10 ° retainers, 140 lb. seat pressure, 370 lb. open pressure.
- 250 CFM flow @ .500 VL, 190 CFM exhaust.
- Clean-up cut on deck, new stem seals.
Stage 2 (60 hp gain)
$1400 if guides are needed.
$1500 if guide plates and studs are needed.
Port matching of intake manifold is recommended ($150 extra, included cleaning.)
