Page 517 - 2019-2020 Racecar Engineering Circle Track Parts and Accessories Catalog

* To purchase individually, substitute
-1 for the -8 suffix in part number.

Severe-Duty Valves Valve Locks
Severe-duty exhaust valves are made of XH-428 stainless Heat-treated, black oxide coated steel locks are
steel which has double the tensile strength of imported valves available in extra-thick Super 7° or traditional 10°
at 1500°F. Nk-844 stainless steel intake valves have a fatigue for conventional or bead lock valves. Sets of 8
strength 1000 times greater than imported valves. Sold in sets (16 pieces) or 16 (32 pieces).
of 8. Part No. Description Installed Height Lock Style
Part No. Type Size Stem Installed Height Super 7°
Small Block Chevrolet 262-400 MAN13050-8 5/16” Valve Locks .050” Less Bead Loc
MAN11567-8* Exhaust 1.500" .3415" Stock
MAN11543-8* Exhaust 1.600" .3415" Stock MAN13051-8 5/16" Valve Locks Standard Bead Loc
MAN11595-8 † Exhaust 1.600" .3415" Stock MAN13052-8 5/16" Valve Locks .050" More Bead Loc
MAN11539-8 # Exhaust 1.600" .3415" .100" Longer MAN13060-8 11/32” Valve Locks .050” Less Bead Loc
MAN11869-8 Exhaust 1.600" .3415" .100" Longer MAN13061-8 11/32" Valve Locks Standard Bead Loc
MAN11749-8 S Exhaust 1.600" .3415" .100" Longer MAN13062-8 11/32" Valve Locks .050" More Bead Loc
MAN11865-8 S Exhaust 1.600" .3415" .200" Longer MAN13080-16 5/16" Valve Locks Standard Conventional
MAN11751-8 S Exhaust 1.600" .3415" .200" Longer MAN13081-16 11/32" Valve Locks .050" Less Conventional
MAN11755-8 S Exhaust 1.600" .3415" .400" Longer
MAN11513-8 S Exhaust 1.600" .3415" .500" Longer MAN13083-16 11/32" Valve Locks Standard Conventional
MAN11763-8 S Exhaust 1.625" .3415" .600" Longer MAN13084-16 11/32" Valve Locks .050" More Conventional
MAN11592-8 Intake 1.937" .3415" Stock Machined 7°
MAN11886-8 Intake 1.940" .3415" .100" Longer MAN13094-16 8mm Valve Locks .050” Less GM LS/LT-1
MAN11826-8 Intake 2.020" .3415" .100" Longer 10°
MAN11846-8 Intake 2.055" .3415" .100" Longer
MAN11818-8 Intake 2.080" .3415" Stock MAN13096-16 5/16" Valve Locks Standard Conventional
MAN11844-8 Intake 2.080" .3415" .100" Longer MAN13097-16* 11/32" Valve Locks Standard Conventional
MAN11858-8 Intake 2.080" .3415" .200" Longer MAN13150-8 5/16” Valve Locks .050” Less Bead Loc
* 7° dish face and 4.911" length # Valve has 10° underhead angle. MAN13151-8 5/16" Valve Locks Standard Bead Loc
† Flat face and 4.936" length S Valve has 15° underhead angle. MAN13152-8 5/16" Valve Locks .050" More Bead Loc
MAN13160-8 11/32" Valve Locks .050" Less Bead Loc
MAN13161-8** 11/32" Valve Locks Standard Bead Loc
NexTek Series MAN13162-8 11/32" Valve Locks .050" More Bead Loc
Oval Track Valve Springs MAN13170-8 7mm Valve Locks Standard Bead Loc
Put an end to spring degradation. NexTek springs MAN13194-16 11/32" Valve Locks Standard Conventional
are made from specially wound, heat-treated, and MAN13195-16 3/8" Valve Locks Standard Conventional
¿QLVK WUHDWHG FKURPH VLOLFRQ 6SULQJ , ' ¶V DUH IXOO\ MAN13198-16 11/32" Valve Locks .050" More Conventional
chamfered for retainer clearance. Sold in sets of 16. * Not recessed to accept a wear cap. ** Lightweight Titanium material
Max. Seat Open Coil
Part No. Application O.D./I.D. Valve Lift Pressure Pressure Bind
Late Model, Titanium 10° Valve Locks
MAN221432-16 1.530"/.750" .630" 162@1.900" 425@1.300" 1.200"
Flat Tappet /LJKWZHLJKW YDOYH ORFNV DUH SUHFLVLRQ FUDIWHG IURP
MAN221440P-16 † Oval Track, Roller 1.570"/.760" .700" 255@2.000" 629@1.300" 1.190" durable titanium
MAN221441P-16 † Oval Track, Roller 1.570"/.750" .730" 280@2.030" 700@1.300" 1.215"
MAN221442-16 Oval Track, Roller 1.560"/.812" .750" 260@2.000" 660@1.250" 1.200" Part No. Valve Stem Installed Height Groove Type Qty.
MAN221443-16 BGN, WoO, LM 1.580"/.832" .730" 235@1.950" 610@1.250" 1.170" MAN13084T-16 .3415” .050” More Conventional 16 Pair
MAN221443P-16 † BGN, WoO, LM 1.580"/.832" .730" 235@1.950" 610 @ 1.250" 1.170" MAN13151T-8 .3110" Standard Bead Loc 8 Pair
MAN221444-16 BGN, WoO, LM 1.610"/.842" .750" 235@2.050" 645@1.300" 1.220" MAN13161T-8 .3415" Standard Bead Loc 8 Pair
MAN221445P-16 † Oval Track, Roller 1.620"/.852" .800" 280@2.050" 680@1.250" 1.200"
MAN221452SF-16* Roller, w/o Damper 1.550"/.800" .825" 250@2.025" 750@1.200" 1.150" MAN13194T-16 .3415" Standard Conventional 16 Pair
MAN221454-16 Sportsman 1.650"/.855" .850" 290 @ 2.000" 825 @ 1.150" 1.105"
* Signifies Super Finished. † Signifies polished finish. Pushrods By Applications
:H¶YH OLVWHG FRPPRQ DSSOLFDWLRQV RI DQG GLDPHWHU
FKURPH PRO\ SXVKURGV $OO SXVKURGV DUH VWHHO KHDW WUHDWHG
10° Titanium Retainers DQG EODFN R[LGH ¿QLVKHG IRU FRUURVLRQ SURWHFWLRQ 6HWV RI RU
0DQOH\¶V $/ 9 WLWDQLXP ƒ
retainers have the durability
needed for racing engines. Sold in sets of 16.
Part No. Application Length Dia.
Spring Dimensions
Part No. Type Height Spring O.D. A B C D MAN25709-16 SB Chevrolet 262-400 Stock Length 7.800" 5/16"
MAN23640-16 Double +.100" 1.625" 1.500" 1.175" .850" — MAN25787-8 SB Chevrolet 262-400 Stock Length 7.800" 3/8"
MAN23644-16 Double Std. 1.550" 1.500" 1.140" .740" — MAN25711-16 SB Chevrolet 262-400 +.050" 7.850" 5/16"
MAN23648-16 Double +.100" 1.580"/1.610" 1.500" 1.150" .825" —
MAN23650-16 Double +.100" 1.550" 1.500" 1.140" .740" — MAN25712-16 SB Chevrolet 262-400 +.100" 7.900" 5/16"
MAN23654-16 Double Std. 1.625" 1.500" 1.175" .765" — MAN25788-8 SB Chevrolet 262-400 +.100" 7.900" 3/8"
MAN23655-16 Double +.100" 1.625" 1.500" 1.175" .765" — MAN25706-16 SB Ford 351C Stock Length 8.400" 5/16"
MAN23658-16 Double Std. 1.550" 1.500" 1.105" .710" — MAN25744-16 SB Ford 351W 8.150" 5/16"
MAN23660-16 Double +.100" 1.550" 1.500" 1.105" .710" —
MAN23661-16 Double +.100" 1.550" 1.500" 1.120" .705" —

2019-20 CIRCLE TRACK PARTS AND ACCESSORIES 513