Page 104 of 2009 Performance Parts by GM Parts Direct

chevy small-block v-8 chevy ls series 88958665 cnc-ported ls6 cylinder head assembly not shown · cnc-portedaluminumperformancehead · 2.00 hollowstemintake,and1.55 sodium-filled exhaustvalves · .570 maxvalvelift · 250cccnc dcathedral-portintakeports · 85cccnc dd-shapedexhaustports · 65cccnc dcombustionchambers ls series cylinder heads part number 12564825 12564824 12576063 88958622 88958665 88958765 12615361 12615355 88958698 12615879 12615361 12578450 12578449 25534428 12480005 12480090 19201807 19201805 19201806 19166981 19166979 description barels2&ls6 stockls6 stockls2 cncls6 cncls6 cncls2 barel92 stockl92 cncl92 stockls3 barels3 barels7 stockls7 as-castls7 c5r1stdesign c5r2nddesign lsx-ls3 lsx-ls7 lsx-ct lsx-dr material aluminum aluminum aluminum aluminum aluminum aluminum aluminum aluminum aluminum aluminum aluminum aluminum aluminum aluminum aluminum aluminum aluminum aluminum aluminum aluminum port size 210 210 210 250 250 250 260 260 279 260 260 270 270 210 210 260 260 270 302 313 valve angle 15deg 15deg 15deg 15deg 15deg 15deg 15deg 15deg 15deg 15deg 15deg 12deg 12deg 12deg 11deg 11deg 15deg 15deg 12deg 11deg 11deg chamber cc s 64.5 64.5 64.5 61.9 65 64.5 70 70 68 70 70 70 70 66 38 30 70 70 70 45 50 int vlv 2.000 2.000 2.000 2.000 2.000 2.000 2.165 2.165 2.165 2.165 2.165 2.200 2.200 2.200 2.180 2.180 2.000 2.160 2.200 2.200 exh vlv 1.55 1.55 1.55 1.55 1.55 1.55 1.59 1.59 1.59 1.59 1.59 1.61 1.61 1.61 1.63 1.63 1.55 1.59 1.61 1.61 int port type cathedral cathedral cathedral cathedral cathedral cathedral l92 l92 l92 l92 l92 ls7 ls7 ls7 c5r c5r l92 l92 ls7 lsx-ct ex port type stdls stdls stdls stdls stdls stdls stdls stdls stdls stdls stdls stdls stdls stdls stdls stdls stdls stdls stdls lsx-ct/dr rocker type bolt-down bolt-down bolt-down bolt-down bolt-down bolt-down bolt-down bolt-down bolt-down bolt-down bolt-down bolt-down bolt-down bolt-down shaft shaft bolt-down bolt-down bolt-down shaft shaft notes barels2/ls6 hollow/sodium-filledvalves solidstemvalves 11.2compression 10.5compression solidstemvalves solidstemvalves solidstemvalves solidstemvalves hollow/sodium-filledvalves barels3 barels7 titanium/sodium-filledvalves discontinued as-cast,noseats/guides as-cast,noseats/guides hollow/sodium-filledvalves hollow/sodium-filledvalves titanium/sodium-filledvalves cncmachinedbarehead cncmachinedbarehead page number n/s 204 205 205 205 205 n/s 206 206 206 206 206 206 n /s n/s 207 208 208 208 209 209 ls6 cylinder head assembly combustion chamber chevy ls series 88958622 cnc-ported ls6 cylinder head assembly not shown a · cnc-portedaluminumperformancehead · 2.00 hollowstemintake,and1.55 sodium-filled exhaustvalves · .570 maxvalvelift · 250cccnc dcathedral-portintakeports · 85cccnc dd-shapedexhaustports · 65cccnc dcombustionchambers heads p/n 12564824 p/n 88958665 and p/n 88958622 are assembled with the following components 12565311 intakevalves 12565312 exhaustvalves 12586484 valvesprings 10166345 valvelocks 10166344 valvespringretainers 12482063 intakevalvestemseals 12482062 exhaustvalvestemseals lsx-l92smallbore aluminum 2.25-2.28 1.6-1.65 lsx-dr lsx-ct/dr 12576063 ls2 cylinder head assembly not shown the ls family production and c5r aluminum heads great cylinder-head airflow has been a key enabler of the ls series exceptionalperformance.gmperformancepartsdeliversthose power-building attributes to you with a range of production-style aluminum heads from the ls6 heads for smaller-displacement engines to ls7 style heads for 427-inch-and-larger combinations ouraluminumheadsbenefitfromgeneralmotors extensive researchanddevelopmentprogram,ensuringmaximumairflow without compromises in fact many professional builders use our heads as straight bolt-ons with no further machining many of our assembled heads use premium machining and materials including cncfinishingandporting,alongwithlightweight,hollow-stem valves,sodium-filledexhaustvalvesand onsomeheads lightweight titanium intake valves cnc-ported ls2 cylinder head assembly exhaust b · lowercostalternativetothels6head · 2.00 solidstemintake,and1.55 solidstem exhaustvalves · .570 maxvalvelift · 210cccathedral-portintakeports · 70ccd-shapedexhaustports · 65cccombustionchambers · bareheadp/n12615363availableseparately · upgradethevalvestols6hollowstemvalveswith p/n17801930 b 88958765 cnc-ported ls2 cylinder head assembly aluminum ls family head technical notes · · · · · · · · manufacturedfrom319-t5aluminumalloy high-efficiencycombustionchambers symmetricalintakeandexhaustports angledsparkplugs14mm;5/8 hex;¾ reach;taper-seat plugs 15°valveangleexceptc5randls7 bolt-down-typerockerarmsexceptc5r center-boltvalvecoverhold-downs fitsgeniiiandgenivsmall-blocksonly a ls6 cylinder head assembly exhaust cnc-ported ls2 cylinder head assembly intake b · cnc-portedaluminumperformancehead · lowercostalternativetothecncls6head · 2.00 solidstemintake,and1.55 solidstem exhaustvalves · .570 maxvalvelift · 250cccnc dcathedral-portintakeports · 85cccnc dd-shapedexhaustports · 65cccnc dcombustionchambers · upgradethevalvestols6hollowstemvalveswith p/n17801930 heads p/n 12576063 and p/n 88958765 are assembled with the following components 12563063 12563064 12586484 10166345 intakevalves exhaustvalves valvesprings valvelocks 10166344 12482063 12482062 valvespringretainers intakevalvestemseals exhaustvalvestemseals a 12564824 ls6 cylinder head assembly · 2.00 hollowstemintake,and1.55 sodium-filled exhaustvalves · .570 maxvalvelift · 210cccathedralportintakeports · 70ccd-shapedexhaustports · 65cccombustionchambers · bareheadp/n12615363availableseparately ls2 and ls6 head flow data lift stock intake stock exhaust cnc intake cnc exhaust 0.200 136 104 147 111 0.300 195 135 215 155 0.400 237 157 262 198 0.500 260 169 290 210 0.600 260 180 307 218 gm performance parts heads will not fit 4.8l and 5.3l engines due to their smaller bore sizes a ls6 cylinder head assembly intake cnc-ported ls2 cylinder head assembly combustion chamber b gm performance parts heads will not fit 4.8l and 5.3l engines due to their smaller bore sizes 204 buy online at www.gmperformanceparts.com additional components required available for purchase online at buy online pagewww.gmperformanceparts.com at 207 for installation see gmperformanceparts.com 205

[close]