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Valves & Valve Springs
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Intake Valves

Click here! 5160 - O.E.M. style replacement intake valves 1.750" head diameter, 45 face, overall length 4.670". 307 Olds, 1980 to date. Set of 8.
$129.00
5165 - O.E.M. style replacement intake valves 1.875" head diameter, 45 face, overall length 4.740". 307-350 Olds. Set of 8.
$129.00
5167 - O.E.M. style replacement intake valves 1.875" head diameter, 45 face, overall length 4.670". .070" shorter than No. 5165. Set of 8.
$129.00
5170 - O.E.M. style replacement intake valves 2.000" head diameter, 45 face, overall length 4.660". 307-455 Olds. Set of 8.
$129.00
5180 - O.E.M. style replacement intake valves 2.072" head diameter, 30 face, overall length 4.685". 350-455 Olds. Set of 8.
$129.00
  5210 - Swirl polished stainless steel 2.072" O.D., 45 valve seats valves for all cylinder heads, overall length 4.665". 350-455 Olds. Set of 8.
$178.00
  5270 - Swirl polished Posi-Flow stainless intake valves 2.072 head diameter, 45 face, overall length 4.710". 5/16" undercut, hard tip & hard-chromed stems. 330-455 Olds V8's 1964-1980. 6% more flow (being undercut) over our 5275 valves. Set of 8.
$178.00
  5272 - 2.000" Hard chrome stainless steel street valves, 45 face, overall length 4.660". Set of 8.
$178.00
  5275 - Swirl polished stainless, hard tip & hard chromed stems. 2.072" head diameter, 45 face, overall length 4.710". Olds 350-455 c.i.d. for high performance street, towing and all fuels. Set of 8.
$178.00
  5277 - One piece street stainless steel valve 2.072" head diameter with a 30 face, overall length 4.700". Direct replacement valve for a stock valve. 11/32" valve stem. Tip is induction hardened, hard chromed stem and recommended for today's gasoline.
$178.00
Click here! 5370 - Stainless Posi-Flow stainless intake valves 2.072" x 11/32" stem 5/16" undercut and are .100" longer on the stem so you can achieve enough installed height when using a mechanical roller camshaft with over .650" lift (overall length 4.850"). When using shallow spring seat heads a 1.900" installed spring height is impossible without these valves. 6% flow increase over our 5275 valves. Set of 8.
$178.00
5375 - Stainless Posi-Flow intake valves 2.100" x 11/32" stem 5/16 undercut with a 45 face. .100" longer than stock for all out competition use so you can obtain the proper installed spring height when using a roller camshaft (overall length 4.850"). 350-455 V8's. 6% flow increase (being undercut). Set of 8.
$178.00

Exhaust Valves

Click here! 5162 - O.E.M. style replacement exhaust valves 1.502" head diameter, 30 face, overall length 4.740". 307 Olds, 1977-80 350, all 403. Set of 8
$129.00
5185 - O.E.M. style replacement exhaust valves 1.562" head diameter, 45 face, overall length 4.735". 350-455 Olds. Set of 8.
$129.00
5190 - O.E.M. style replacement exhaust valves 1.625" head diameter, 45 face, overall length 4.690". 350-455 Olds. Set of 8.
$129.00
5192 - O.E.M. style replacement exhaust valves 1.625" head diameter, 30 face, overall length 4.680". Fits some Olds 455 models 1973-76. Set of 8.
$129.00
5195 - O.E.M. style replacement exhaust valves 1.687" head diameter, 30 face, overall length 4.670". Fits some Olds 455 models 1973-76. Set of 8.
$129.00
  5220 - Swirl polished stainless steel exhaust valves, 1.710" O.D. 45 face for all cylinder heads 350 to 455, overall length 4.715". Set of 8.
$178.00
  5280 - Swirl polished Posi-Flow stainless exhaust valves 1.680 head diameter, 45 face, overall length 4.710". 5/16" undercut, hard tip & hard-chromed stems. 330-455 Olds V8's 1964-1980. 6% flow increase. Set of 8.
$178.00
  5282 - 1.625" Hard chrome stainless steel street exhaust valves, 45 face, overall length 4.695". Set of 8.
$178.00
  5285 - Swirl polished stainless exhaust valves, hard tip & hard chromed stems. 1.710" head diameter, 45 face, overall length 4.710". Olds 350-455 for high performance street, towing and all fuels. Set of 8.
$178.00
  5290 - Swirl polished stainless exhaust valves 1.680" head diameter with a 45 face, overall length 4.705". Hard tip and hard chromed stems for high performance street, towing and all fuels when using hard alloy exhaust seats for unleaded fuels. Use #1453 seats. Set of 8.
$178.00
Click here! 5295 - Stainless Posi-Flow exhaust valves. 1.680" head diameter, 11/32" stem, 5/16" undercut, 45 face, and the overall length is 4.705". Recommended for high performance applications. For use with our hardened exhaust valve seat #1453 for unleaded fuel. (Can also be used without hardened valve seats.) 350-455 V8's. 6% flow increase over our 5290 valves. Set of 8.
$178.00
5380 - Stainless Posi-Flow exhaust valves 1.710" x 11/32" stem, 5/16" undercut with a 45 face. .100" longer on the stem. Other specs the same as the 5370 intake valves (overall length 4.850"). 6% flow increase (being undercut). Set of 8.
$178.00


TECHNICAL NOTE
On some Early small block Olds heads (casting # 1, 2, 3, 4 & some 5) the installed spring height is very short, usually 1.600", and in many cases the spring seats need to be machined up to .090" to achieve proper installed spring height.  This may also happen on some Olds big block heads #A, B & C.  The Olds small block 7 and 7A heads and some big block "G" heads usually are 1/2 deep & 1/2 shallow. If so, specify or machine heads to all deep spring seats.
(Shallow spring seat heads do not have valve spring rotators while deep spring seat heads do.  Be sure to check your heads closely.)

Valve Springs

Click here! SK-240-D - Silicon-vanadium outer and inner valve springs. Chrome moly retainers and heat-treated valve keepers. Double spring - no dampener. Use with camshaft JM-18-20 or larger. Big block Olds casting #'s D-DA-E-G-H-J-K-F and small block 6-8-3A-4A-5A and some 7-7A heads. Set of 16.  (When ordering spring kits please specify shallow or deep seats on the billing page in the "Comments" section.  All engines with rotator valve spring retainers are deep spring seat heads.)
$179.00
SK-240-S - Silicon-vanadium outer and inner valve springs. Chrome moly retainers and heat-treated valve keepers. Double spring - no dampener. Use with camshaft JM-18-20 or larger. Big block Olds casting #'s A-B-C-CA and small block #'s 1-2-3-4-5 and some 7-7A heads. Set of 16.  Note:  Shallow spring seat heads do not have valve spring rotators while deep spring seat heads do.
$179.00
Click here! SK-245-D - Silicon-vanadium valve spring.  Fits all (stock valve seals) and deep spring seat heads #D-DA-E-F-G-H-J-K big block and all 6-8-3A-4A-5A and some 7 & 7A small blocks.  Heavy-duty, single-type spring with flat wound harmonic dampener.  Kit includes chrome moly steel retainers and heat-treated steel valve keepers.  Will accept up to .600" cam lift, has 1.800" installed height and 125 lbs of spring tension.  Recommended for any cam and Mondello up to JM-22-25 grind only.  Can be installed at 1.75" giving 140 lbs of seat tension and will take up to .550" lift.  Set of 16.
$179.00
SK-245-S - Similar to SK-245-D but will fit shallow spring seat heads with casting #'s A-B-C-CA big block and 1-2-3-4-5-6 and some 7 & 7A small block.  Will accept up to .500" cam lift, has 1.700" installed height and 125 lbs of spring tension.  Set of 16.  Recommended for any Mondello cam up to JM-16-18.  Use SK-240-S or SK-247-SP spring kit with our larger camshafts.
$179.00
Click here! SK-247-SP - Silicon-vanadium steel outer valve spring with flat wound harmonic dampener designed for cams up to our JM-22-25 while using stock type umbrella valve seals.  Installed height is 1.700", seat pressure is 130 lbs at .530" lift.  320 lbs open pressure.  The spring coil binds at 1.100". (Use SK-240-S or -D for racing engines.)  This kit is for shallow spring seat heads (big block A-B-C & CA and small block 1-2-3-4-5 and some 7 & 7A heads) and it allows you to run up to a JM-22-25 camshaft.
$179.00
  SK-250-SD - This kit is designed for cylinder heads with half deep and half shallow spring seats.  This kit works with all Mondello hydraulic camshafts including roller hydraulic and mechanical flat tappet camshafts with lifts up to .650" with no coil bind problems.  You must use a small type positive Teflon valve seal like our VS-650 or VS-660 to clear the inner valve spring.  Kit includes 16 springs, chrome moly spring retainers and heat treated steel valve keepers. (Includes 8 springs from the SK-245-D and 8 springs from the SK-247-SP spring kits.)
$179.00
  SK-252-SD - This kit is designed for cylinder heads with half deep and half shallow spring seats.  This kit works with all Mondello hydraulic and mechanical non-roller camshafts up to a .540" lift.  You can use any valve seal with this spring kit.  Kit includes 16 springs, chrome moly spring retainers and heat treated steel valve keepers. (Includes 8 springs from the SK-245-D and 8 springs from the SK-247-SP spring kits.)
$179.00
  SK-695 - Street/strip camshaft spring, designed for mechanical roller cams with no more than .608" lift.  This spring installs at 1.800" installed height, will take .640" lift and is good for 6,500 RPM.  Kit includes springs, chrome moly retainers & heat treated valve locks.  At 1.800", 210 lbs. on the seat and .640" lift with 510 lbs. open pressure.  1.540" outer diameter.
$335.00
Click here! 593 - Silicon-vanadium stock replacement valve spring with harmonic dampener.  Works with rotator or non-rotator valve spring retainers.  Installed height 1.687" with 125 lbs seat tension.  Will work with any stock-type camshaft up to .500" valve lift.  Recommended with up to Mondello JM-16-18 hydraulic camshaft at .500" cam lift, 255 lbs open tension and .600" cam lift before coil bind.  You can use any of our chrome moly retainers for this spring: CR-300, 310, 320.  Works with stock valve seal.  Replacement springs for our  SK-245-S spring kit.
$129.00
993 - Silicon-vanadium, heavy duty valve spring with harmonic dampener.  Use with  stock steel retainer or any Mondello chrome moly retainer: CR-300, 310, 320.  Installed height 1.800" with 125 lbs seat tension, .500" cam lift with 265 lbs tension, .600" cam lift with 305 lbs open tension.  Recommended with any stock cam or up to Mondello JM-22-25 camshaft.  Springs can be set at 1.750" for shallow spring seat heads using our CR-320 retainers.  works with stock valve seal.  Replacement springs for our SK-245-D spring kit.
$129.00
Click here! 361 - Dual valve spring kit. Set of 16.  Replacement springs for our SK-240-S spring kit.
$129.00
361-007 - Dual valve spring kit. Set of 16. Replacement springs for our SK-240-D kit.
$129.00
Click here! 3105-D - Replacement springs for our SK-247-SP spring kit.
$129.00
  9265 - Replacement springs for our SK-695 roller spring kit.
$229.00

Retainers, Keepers, Seals & Seats

Click here! VK-340 - Heat treated steel valve keepers.  Over 100% stronger than stock valve keepers. Set of 32.
$18.00
VK-345 - Machined chrome moly 7 11/32" hardened valve keepers.  These come in all of our roller spring kits.
$24.00
Click here! CR-300 - Chrome moly steel valve spring retainer.  Replaces stock roto-cap retainers.  All engines Olds 330-455.  Set of 16
$79.00
CR-310 - Chrome moly steel valve spring retainer.  Same as CR-300 except has .060" longer installed height for obtaining proper spring height.  Set of 16.
$79.00
CR-320 - Chrome moly steel valve spring retainer.  Same as CR-300 except has .125" longer installed height for obtaining proper spring height.  Set of 16.
$79.00
Click here! LC-1132 - Chrome moly heat treated valve tip lash caps.  Fits all Olds 11/32" valve stems.  Very helpful in achieving correct rocker arm geometry.
$42.00
Click here! VS-650 - Teflon valve seal for maximum oil control.  Fits all .500" O.D. valve guides with 11/32" valve stem size.  Valve guides must be machined to .500" dia x .700" tall to accept these seals.  Use seal cutter SC-620.
$29.00
VS-660 - Teflon valve seal for maximum oil control.  Fits all .530" O.D. valve guides with 11/32" valve stem size.  Valve guides must be machined to .530" dia x .700" tall to accept these seals.  Use seal cutter SC-630.
$29.00
Click here! 1453 - Martite alloy replaceable exhaust valve seats for unleaded fuel use.  This valve seat is for 1.625" up to 1.680" O.D. exhaust valves.  The valve seat dimension is 1-7/16" taper I.D., 1.755" O.D., and .187" thick.  Use a 1.750" cutter for installation.  Use #5290 valves.
$99.00
Click here! HG-455 Valve Stem Height Gauge
Made exclusively for Mondello's to measure valve stem height on cast iron heads.  Critical when using OEM rockers and stands.
$65.00

 

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