205cc LS1 Mongoose Street Head PN# 1510 $2200   The Small Port, High Velocity Torque Monster  LS1 AFR Mongoose Street Heads    LS1 Dyno Test

Baseline Engine: Stock LS-1 Longblock, LS-6 Intake Manifold, 1 3/4" Headers-Long Tube Style, 3" Flowmaster Mufflers. * VS All Same As Above WithThe Exception Of: AFR LS-1 "205" CNC Heads, Fast Intake Manifold, Cam-224/228 @.050 .581 Lift, 78mm Ported Throttle Body. * AFR LS-1 "205" CNC Heads 530HP@6500 and 475lbft@4900 VS Stock Heads 428HP@5700 and 432lbft@4700 *Compression Remained Stock for Both Tests.

For the ultimate street LS1/LS6 aluminum cylinder head AFR’s all new 205cc emission legal head are your only choice. Specifically designed for 1995 to present Gen-3 Chevy Corvettes, Camaros, and trucks. AFR’s LS1 head offers unmatched flow performance (300 CFM at .600lift) and features 2.020 intake and 1.600 exhaust valves with AFR’s iron ductile interlocking valve seats. With only 205cc port volume (same as stock LS1 head) this is an incredibly 70 CFM increase over stock casting creating unbelievable port velocity and performance. The 205cc is ideal for normally aspirated 346C.I. to 396C.I. It is available with 66cc and 76cc combustion chambers. An affordable “as cast” version is also available. AFR’s LS1 is a direct bolt on, no special parts required. Structural features like Air Flow Research’s trademark 3/4” thick head deck, a must for blown and nitrous applications, reinforced rocker stud bosses, and thick wall runners provide unparalleled durability. An exclusive new modern combustion chamber design with double quench pad area helps the LS1 generate huge low and mid lift airflow numbers. If you need a snake charmer for that pesky neighborhood “Cobra Mustang” look no further. Note: Hydraulic roller cams typically experience valve float at 6000-6200 RPM because of their fast ramp rates. AFR suggest you upgrade your springs to AFR part #8019, 1.250 O.D. double with dampener valve spring with higher pressures(145lbs on seat, 390+lbs at .600 lift) to reduce the chances of valve float at higher RPM’s with the #8019 spring AFR recommends Comp Cams R style lifter. Description  Part Number 205cc CNC Ported w/parts 66cc 1510 205cc CNC Ported w/o parts 66cc 1520 205cc CNC Ported w/parts 76cc 1530 205cc CNC Ported w/o parts 76cc 1540 200cc As Cast w/o parts 64cc 1541 200cc As Cast w/o parts 74cc 1542

__________________________________________________________________________________ __________________________________________________________________________________  NOW AVILABLE FOR MAXIMUM POWER   225cc LS1 Mongoose Strip Head PN# 1610 $2400   The Ultimate Bolt-On Emission Legal Street/Strip Weapon For the maximum street/strip LS1/LS6 aluminum cylinder head AFR’s all new 225cc emission legal head E/O #D250-4 are hands down the best choice. Specifically designed for 1995 to present Gen-3 Chevy Corvettes, Camaros, and trucks. AFR’s LS1 head offers unmatched flow performance and features 2.080 intake and 1.600 exhaust valves with AFR’s iron ductile interlocking valve seats. The 225cc is ideal for normally aspirated 396C.I. to 427C.I. For a wild 346 ci the 225 is a good choice, however some low RPM loss of torque might occur. It is available with 62cc and 72cc combustion chambers. An affordable “as cast” version is also available. AFR’s LS1 is a direct bolt on, no special parts required. Structural features like Air Flow Research’s trademark 3/4” thick head deck, a must for blown and nitrous applications, reinforced rocker stud bosses and thick wall runners provide unparalled durability. An exclusive new modern combination chamber design with double quench pad area helps the LS1 generate huge low and mid lift airflow numbers. If you need a snake charmer for that pesky neighborhood “Cobra Mustang” look no further! Note: Hydraulic roller cams in "LS" Gen III engines typically experience valve float at 6600-6800 RPM's. If your plan on running over .600 gross valve lift and/or 6600 RPM, AFR suggest you upgrade your springs to AFR part #8019. Our upgrade spring has higher seat and open pressures (145/390+) to better reduce the risk of valve float in more aggressive applications. AFR also recomends the use of Comp "R" lifters in conjunction with our 8019 spring upgrade. Recommend application. Over 400cid,Over 7000rpm     Description  Part Number 225cc CNC Ported w/parts 62cc 1610 225cc CNC Ported w/o parts 62cc 1620 225cc CNC Ported w/parts 72cc 1630 225cc CNC Ported w/o parts 72cc 1640 ________________________________________________________________________________________      DART HEADS Dart calls these Pro 1 LS1 cylinder heads a secret weapon. Using their proprietary "Speed Flow" technology and the same aircraft-quality 355-T6 aluminum used in their Pro Stock heads, Dart has produced these affordable, yet powerful LS1-type cylinder heads. Five-axis, CNC-blended combustion chambers generate improved airflow and flame propagation, which increase both power and torque. With two available intake-port sizes that flow very well as-cast, there is a choice for strong street performance, as well as one for maximum street performance or bracket racing. These heads have extra material on top for added flexibility to upgrade the valvetrain, and they're set up for big valves with bronze valve guides and hardened seats. They're available either bare or assembled, and they're drilled for stock accessories with stock port locations, so you can use stock components. In 205cc CC 62cc $1680 156/109 200 215/154 300 258/187 400 290/205 500 296/210 600 In 225cc CC 62cc $1680 144/109 200 202/154 300 254/187 400 290/205 500 301/210 600   See pdf file   Edelbrock/Lingenfelter LS1 CNC Cylinder Heads These Edelbrock LS1 cylinder heads are CNC-ported by one of the best, most experienced Gen III engine builders--Lingenfelter Performance Engineering. These cylinder heads have completely CNC-ported intake and exhaust runners for the ultimate in airflow efficiency. They feature a 65cc (stock size) combustion chamber for bolt-on convenience, reinforced rocker bosses for added strength, extra-thick port walls for additional porting, and dual quench combustion chambers for more efficient combustion. CNC-ported by Lingenfelter Performance Engineering, benefiting from years of experience in GEN III performance modifications Designed for 1997 and later GM LS1 and other GEN III engines, including 4.8L, 5.3L and 6.0L V8s. 65cc combustion chamber retains the stock compression ratio for bolt-on convenience Available bare or fully assembled and ready to bolt-on with high-quality stainless steel 2.02" intake and 1.57" exhaust valves. Combustion Chamber 65cc, CNC ported Intake Runner Volume 202cc, CNC ported  Exhaust Runner Volume 83cc, CNC ported Intake Valve 2.02-inch Exhaust Valve 1.57-inch Deck Thickness 5/8-inch Valve Spring 1.055-inch / 1.290-inch O.D Up to .600" lift Valve train Stock shaft rocker system    In 203cc CC 65cc $2450 141/115 200 200/162 300 245/196400 282/209 500 300/217 600     See pdf file      Trick Flow CNC-ported LS1 performance cylinder heads change the valve angles from 15 to 13.5 degrees, decreasing valve shrouding, and increasing mid-lift airflow and rocker arm to valve cover clearance. Further enhancements included relocating the spark plug position in the combustion chamber for better airflow, and the addition of material in critical rocker arm mounting points for an increase in high-rpm valvetrain stability. These heads come available in assembled or bare configurations, depending on your performance needs.  215cc intake runners  80cc exhaust runners  64cc combustion chambers  2.040 in. intake valves  1.575 in. exhaust valves  Bronze valve guides  Ductile iron valve seats In 215cc CC 64cc $2350 142/115 200 215/185 300 260/230 400 300/251 500 320/259 600      LS6 CNC300 HEADS   LS7 Stock Heads $$1640 each VALVE LIFT .100 .200 .300 .400 .500 .600 .700 Intake Port 71.0 145.0 222.0 271.0 315.0 348.0 352.0 Exhaust Port 60.0 120.0 159.0 192.0 207.0 219.0 221.0 Intake Valve 2.200"  Exhaust Valve 1.610". ________________________________________________________________________________ Comp Cams CAMSHAFTS   EDL-2215 Basic Operating RPM Range: 1500-6500 RPM 12" Vacuum @1000rpm Duration 050 inch Lift: Intake 220 Exhaust 224 Advertised Duration: Intake 300 Exhaust 300 Valve Lift Intake 0.510 Exhaust 0.510 Lobe Separation (degrees): 111 In C/L-108   CC-54-412-11 XR265HR Good torque & mid-range. Basic Operating RPM Range: 1200-6000 RPM Duration 050 inch Lift: Intake 212 Exhaust 218 Advertised Duration: Intake 265 Exhaust 271 Valve Lift Intake 0.522 Exhaust 0.529 Lobe Separation (degrees): 114 CC-54-424-11 XR265HR Great street wide power band excellent response Basic Operating RPM Range: 1400-6700 RPM Duration 050 inch Lift: Intake 212 Exhaust 218 Advertised Duration: Intake 265 Exhaust 271 Valve Lift Intake 0.558 Exhaust 0.563 Lobe Separation (degrees): 115 CC-54-414-11 XR269HR Great mid-range & good top end. Basic Operating RPM Range: 1300-6300 RPM Duration 050 inch Lift: Intake 216 Exhaust 220 Advertised Duration: Intake 269 Exhaust 273 Valve Lift Intake 0.525 Exhaust 0.532 Lobe Separation (degrees): 114 CC-54-416-11 XR273HR Street/strip mid to high RPM. Basic Operating RPM Range: 1600-6600 RPM Duration 050 inch Lift: Intake 220 Exhaust 224 Advertised Duration: Intake 273 Exhaust 277 Valve Lift Intake 0.530 Exhaust 0.534 Lobe Separation (degrees): 112 High Energy Pro Magnum                                  EDL-2216 Basic Operating RPM Range: 2200-7000 RPM 10" Vacuum @1000rpm Duration 050 inch Lift: Intake 230 Exhaust 237 Advertised Duration: Intake 314 Exhaust 322 Valve Lift Intake 0.540 Exhaust 0.540 Lobe Separation (degrees): 110 In C/L-106   CC-54-444-11 XER273HR Serious street/strip high RPM Basic Operating RPM Range: 2000-7000 RPM Duration 050 inch Lift: Intake 220 Exhaust 224 Advertised Duration: Intake 273 Exhaust 279 Valve Lift Intake 0.581 Exhaust 0.588 Lobe Separation (degrees): 114 CC-54-426-11 XR275HR Great street/strip likes to RPM Basic Operating RPM Range: 1800-6800 RPM Duration 050 inch Lift: Intake 222 Exhaust 224 Advertised Duration: Intake 275 Exhaust 277 Valve Lift Intake 0.566 Exhaust 0.568 Lobe Separation (degrees): 112 CC-54-418-11 XR277HR Street/strip LS6 Basic Operating RPM Range: 2000-6800 RPM Duration 050 inch Lift: Intake 224 Exhaust 228 Advertised Duration: Intake 277 Exhaust 281 Valve Lift Intake 0.534 Exhaust 0.537 Lobe Separation (degrees): 112 CC-54-428-11 XR281HR High RPM radical street better strip Basic Operating RPM Range: 2000-6800 RPM Duration 050 inch Lift: Intake 228 Exhaust 230 Advertised Duration: Intake 281 Exhaust 283 Valve Lift Intake 0.571 Exhaust 0.573 Lobe Separation (degrees): 112 CC-54-446-11 XER281HR Race only Basic Operating RPM Range: 2400-7200 RPM Duration 050 inch Lift: Intake 232 Exhaust 234 Advertised Duration: Intake 281 Exhaust 283 Valve Lift Intake 0.595 Exhaust 0.598 Lobe Separation (degrees): 112 CC-54-448-11 XER287HR Race only Basic Operating RPM Range: 2800-7200 RPM Duration 050 inch Lift: Intake 238 Exhaust 240 Advertised Duration: Intake 287 Exhaust 289 Valve Lift Intake 0.605 Exhaust 0.609 Lobe Separation (degrees): 112                                        Competition Cams High Energy Hydraulic Roller Lifters $245 These High Energy hydraulic roller lifters are for use with the newly designed hydraulic roller cam series from Comp Cams, or as a performance replacement for stock hydraulic roller lifters. You must be certain that the lifter is correct for the type of block used. Good t0 about 6400rpm Competition Cams Pro Magnum Hydraulic Roller Lifters $245 These Comp Cams Pro Magnum hydraulic roller lifters are specifically designed to perform at higher engine speeds. When engines are equipped with a hydraulic roller camshaft, high rpm is limited by the improper position of the internal piston, as the lifter inevitably "pumps up". This improper location results in broken valves, and therefore leads to lost power or sometimes even engine failure. These lifters offer a distinct advantage over standard high-performance hydraulic lifters, especially in race applications where a hydraulic lifter must be used. 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