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Street Heads LS-1
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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)
Titanium retainers, new seats, 10 ° locks.
- 300 CFM flow rate @ .600VL" with LS6 and
6L heads.
- Milled .030" for increased CR.
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Stage 3 (100 hp gain) $1900
Although not thought of as a street
head, it can be used on a street driven car. Recommend big bore and valve
relieved pistons.
- 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.
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Street Heads LT-1
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.
Pricing: $900 base
$1000 if guides are needed.
$1100 if guide plates and studs are needed.
Port matching of intake manifold is recommended
($150 extra, includes cleaning.) |
Other LT1 Possibilities:
- Stage 3 heads can be built.
- LT4 possibilities exist.
- AFR bare heads can be prepped to your specs.
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Stage 2 (60 hp gain)
- 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.
Pricing: $1300 base
$1400 if guides are needed.
$1500 if guide plates and studs are needed.
Port matching of intake manifold is recommended
($150 extra, included cleaning.)
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