These LS3's make a solid 30 - 35hp more! The LS7 heads make 40-50hp increase and with a cam they make 100hp. Pump gas 11.5:1 compression LS7 with a cam and Fast intake. Dyno tuned to 705hp and it made peak power at 6800rpm with only a .650 lift camshaft.  These port programs were designed by Darin Morgan and available through Speier Racing Heads.  The first in house will be the LS3.

 FLOW 265cc (4.060) TECH INFO SRH SBC vLS3
LIFT INT EXH
.200 141 111
.300 219 146
.400 281 175
.500 322 205
.600 349 220
.700 355 225
.800 367 230
Runner Volume 265cc
Chamber 70cc (milling available)
Valve Size 2.165/1.600
Seat Angles 45º Intake 45º Exhaust
Minimum CSA  
Intake Opening  

 

SRH SBC vLS3 and vLS7
This is a fully CNC cylinder head machined and Reher-Morrison Racing Engines.  Heads are complete with 2.165 Hollow Stem GM Valves, GM exhaust valves, .570 max lift springs, seals, assembled.   Upgrades are available.
NEW GM CNC LS3 Heads $1850
NEW GM LS7 Heads
Package Upgrades Add:
Hollow Stem Ferrea Valves $480

Single PAC 1518 Spring/Retainer

$265
Dual Spring/Titanium Retainer $365

Comp Cams 13702 Trunion Kit

$139.95

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