Kenny Duttweiler 23 Degree Heads, 64cc CNC-Profiled Chambers, Assembled

	Application	Combustion Chamber Profile	Combustion Chamber Volume	Intake Port Volume	Exhaust Port Volume	Valve Springs
TFS-30400001-CNC $1270	Pre-1987 327/350/400	CNC-Profiled	64cc	195cc	72cc	1.250" Single Springs
TFS-30400002-CNC $1150	Pre-1987 327/350/400	CNC-Profiled	64cc	195cc	72cc	1.470" Single Springs
TFS-30400003-CNC $1410	Pre-1987 327/350/400	CNC-Profiled	64cc	195cc	72cc	1.460" Dual Springs
TFS-30400005-CNC $1270	1987-95 350 (non-LT1)	CNC-Profiled	64cc	195cc	72cc	1.250" Single Springs
TFS-30400006-CNC $1350	1987-95 350 (non-LT1)	CNC-Profiled	64cc	195cc	72cc	1.470" Single Springs
TFS-30400007-CNC $1460	1987-95 350 (non-LT1)	CNC-Profiled	64cc	195cc	72cc	1.460" Dual Springs

Kenny Duttweiler 64cc with CNC Chambers 23 Degree Airflow Chart

Lift Value:	Intake Flow (CFM):		Exhaust Flow (CFM):
0.100	64		56
0.200	138		105
0.300	198		146
0.400	237		171
0.500	257		186
0.600	258		196

NOTE: Tests conducted at 28" of water (pressure). CNC-profiled chambers.

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Kenny Duttweiler 23 Degree Heads, 72cc CNC-Profiled Chambers, Assembled

	Application	Combustion Chamber Profile	Combustion Chamber Volume	Intake Port Volume	Exhaust Port Volume	Valve Springs
TFS-30400012-CNC $1335	Pre-1987 327/350/400	CNC-Profiled	72cc	195cc	72cc	1.470" Single Springs
TFS-30400013-CNC $1440	Pre-1987 327/350/400	CNC-Profiled	72cc	195cc	72cc	1.460" Dual Springs
TFS-30400014-CNC $1335	1987-95 350 (non-LT1)	CNC-Profiled	72cc	195cc	72cc	1.470" Single Springs
TFS-30400015-CNC $1440	1987-95 350 (non-LT1)	CNC-Profiled	72cc	195cc	72cc	1.460" Dual Springs

Kenny Duttweiler 72cc with CNC Chambers 23 Degree Airflow Chart

Lift Value:	Intake Flow (CFM):		Exhaust Flow (CFM):
0.100	71		53
0.200	142		99
0.300	196		135
0.400	234		167
0.500	249		186
0.600	249		199

NOTE: Tests conducted at 28" of water (pressure). CNC-profiled chambers.

 

Compare to AFR Heads.

 

$1300 195cc AFR CNC Street Ported Heads

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LT1 Aluminum Cylinder Heads for Small Block Chevrolet  $1450

An LT1 can make more torque and horsepower with a set of Trick Flow aluminum cylinder heads. Designed for supercharged, nitrous, and stroker applications, Trick Flow aluminum cylinder heads for Chevrolet LT1 feature high flow 195cc intake ports, 75cc exhaust ports, and 62cc combustion chambers. They retain the use of stock sensors and fittings and are available in bare or fully assembled versions. Assembled heads include stainless steel 2.02" intake/1.60" exhaust valves, 1.46" double valve springs, retainers, locks, guideplates, and 3/8" rocker studs.

LT1 62cc 23 Degree Airflow Chart

Lift Value:	Intake Flow (CFM): 195cc		Exhaust Flow (CFM): 72cc
0.100	51		58
0.200	136		98
0.300	191		136
0.400	230		163
0.500	253		177
0.600	254		190

NOTE: Tests conducted at 28" of water (pressure).

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AFR 908 LT1 Heads 56 to 74cc 23 Degree Airflow Chart $1800

Lift Value:	Intake Flow (CFM):180cc		Exhaust Flow (CFM): 64cc
0.100	-		-
0.200	129		108
0.300	195		156
0.400	240		178
0.500	255		190
0.600	260		194

NOTE: Tests conducted at 28" of water (pressure).

 $1800 180cc AFR CNC LT1 Street Ported Heads

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Stock LT1 Heads 58cc 23 Degree Airflow Chart

Lift Value:	Intake Flow (CFM): 170cc		Exhaust Flow (CFM):
0.100	72		52
0.200	129		100
0.300	180		130
0.400	213		142
0.500	214		149
0.600	215		154

NOTE: Tests conducted at 28" of water (pressure).

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R-Series 215 Aluminum Cylinder Heads for Small Block Chevrolet

Trick Flow R-Series 215 aluminum cylinder heads will give a performance boost to race-only small blocks. Based on the 23 Degree Kenny Duttweiler heads, the R-Series 215 heads have 67cc combustion chambers, larger, high flow 215cc intake and 78cc exhaust ports, plus larger 2.08" stainless steel intake valves. We even offer 1.530" or 1.550" double valve springs for use with cams up to .680" of valve lift. The result? More airflow in the mid and upper rpm range—and that means more power.

The R-Series 215 heads are fully assembled with valves, valve springs, 10° machined steel locks, retainers, and Viton seals. ARP 7/16" rocker studs and guideplates for 5/16" pushrods are included. Heads are not emissions-legal.

R-Series 215 Heads, Assembled

	Combustion Chamber Volume	Intake Port Volume	Exhaust Port Volume	Valve Sizes	Valve Springs	Valve Locks
TFS-32400006 $1460	67cc	215cc	78cc	2.08 in. Intake, 1.60 in. Exhaust	1.530 in. Dual Springs	10° Machined Steel with Lash Cap Recess
TFS-32400007 $1500	67cc	215cc	78cc	2.08 in. Intake, 1.60 in. Exhaust	1.550 in. Dual Springs	10° Machined Steel with Lash Cap Recess

Lift Value:	Intake Flow (CFM): 215	Exhaust Flow (CFM): 78cc
0.100	66	57
0.200	141	107
0.300	199	145
0.400	244	175
0.500	273	190
0.600	282	198
0.700	287	203

NOTE: Test conducted at 28" of water (pressure). Exhaust with pipe.

Compare to AFR Heads.

$1500 210cc AFR CNC Heads

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18 Degree Aluminum Cylinder Heads for Small Block Chevrolet

Trick Flow’s 18 Degree heads can make serious horsepower...power ideal for high rpm circle track or Super-class drag racing. Dyno testing proves it—a 406 cubic inch, 12:1 compression small block with out of the box 18 Degree heads produced 730 peak horsepower at 7,500 rpm and 545 ft.-lbs. of peak torque at 6,000 rpm.
The heads deliver high airflow numbers—334 cfm intake/246 cfm exhaust—right out of the box. They feature 56cc combustion chambers, 250cc raised intake and 100cc exhaust runners, ductile iron intake and hard bronze exhaust valve seats, and manganese bronze valve guides. The bare castings are machined for 2.15"/1.625" valves (and can accept intake valves up to 2.20") and 1.550" valve springs. Assembled heads are also available, featuring 2.15"/1.60" stainless steel valves, 1.55" dual valve springs, and 10° retainers and locks.
Trick Flow 18 Degree heads accept most current 18 degree intake manifolds (including two-piece manifolds), headers, and other components. They require the use of offset shaft mount rocker arms and a mechanical roller camshaft with offset intake lifters.

	Combustion Chamber Volume	Intake Port Volume	Exhaust Port Volume	Valve Sizes	Valve Springs	Bare or Assembled
TFS-31800001A $2130	56cc	250cc	100cc	2.15" Intake, 1.60" Exhaust	1.560" Dual Springs	Assembled

Cylinder Heads 18 Degree Airflow Chart