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Chevy Performance - PROFORM GM, GMPP, AND CHEVROLET VALVE COVER PARTS | ![]() |
Proform Chrome, Black Crinkle Paint, Polished Valve, Gray Epoxy, Stamped Steel, and Cast Aluminum Valve Cover Parts. Note: More parts will be added as time permits. If you don’t see the Proform part you are looking for, give us a call and if we don’t have it in stock, we will try to get it for you. We have much more Proform parts in stock then we have time to put on our web site. |
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If you have you just came from a search engine and are stuck with no navigation, turn on Java Scripts in your Web browser, reload the page, then you can turn off Java Scripts again. Also, people using Internet Explorer have to use the pull down tab next to the back button to return to a search engine. More information on this is on our help page. |
GM and Chevy Performance part prices are in the Price & Parts search. Keys are to be used with the Price & Parts Search. Enter a Key, part number, GM, SC, or a key word, like 502, into the Price & Parts search to see if we have it on our site. Use GM for a list of both GM and GMPP parts. Use SC for a list of all Chevy Performance exclusive parts. Aftermarket company prices are on downloadable Price Sheets or on their pages. The Page Search is for searching the pages of our Web site. More information on this is on our help page. |
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PROFORM WEB SITE LINKS AND SEARCH HELP | ![]() |
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PROFORM NAVIGATION | ![]() |
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PROFORM VALVE COVER PARTS | ![]() |
Part Number | Description | Picture |
141-902 |
High-Tech Chrome Valve Cover Wing Nuts
Fits Chevrolet® small-block, big-block, and V6 with 1/4” x 20 threads. Chevrolet “Bow Tie” logo is cut sharply into
the top of each wing nut. The lower ends of the shafts are manufactured with wide shoulders for broad load
distribution, and each wing nut is supplied with a separate stud which permits precise gasket positioning on the head
prior to mounting the valve covers. Four wing nuts per package, enough for one valve cover.(Red Painted Bow Tie) |
141-600 GM 12341987 |
High-Tech Chrome Valve Cover Wing Nuts
Fits Chevrolet® small-block, big-block, and V6 with 1/4” x 20 threads. Chevrolet “Bow Tie” logo is cut sharply into
the top of each wing nut. The lower ends of the shafts are manufactured with wide shoulders for broad load
distribution, and each wing nut is supplied with a separate stud which permits precise gasket positioning on the head
prior to mounting the valve covers. Four wing nuts per package, enough for one valve cover.(Non-Painted Bow Tie) |
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141-364 |
High-Tech Gray Epoxy Valve Cover Wing Nuts
Fits Chevrolet® small-block, big-block, and V6 with 1/4” x 20 threads. Chevrolet “Bow Tie” logo is cut sharply into
the top of each wing nut. The lower ends of the shafts are manufactured with wide shoulders for broad load
distribution, and each wing nut is supplied with a separate stud which permits precise gasket positioning on the head
prior to mounting the valve covers. Four wing nuts per package, enough for one valve cover.(Red Painted Bow Tie) |
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141-756 |
High-Tech Black Crinkle Paint Valve Cover Wing Nuts
Fits Chevrolet® small-block, big-block, and V6 with 1/4” x 20 threads. Chevrolet “Bow Tie” logo is cut sharply into
the top of each wing nut. The lower ends of the shafts are manufactured with wide shoulders for broad load
distribution, and each wing nut is supplied with a separate stud which permits precise gasket positioning on the head
prior to mounting the valve covers. Four wing nuts per package, enough for one valve cover.(Red Painted Bow Tie) |
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66650 Chrome 66652 Red 66653 Blue |
Hex Head Aluminum Mini Valve Cover Nuts
Fits Chevrolet® small-block, big-block, and V6 with 1/4” x 20 threads. Each wing nut is supplied with a separate stud which permits precise
gasket positioning on the head prior to mounting the valve covers. Four wing nuts per package, enough for one valve cover. Nuts are approximately 7/8” tall.
Red 66652 shown in picture to the right. |
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66038 Chrome |
High-Torque Hex Head Chrome Mini Valve Cover Nuts
These chrome, steel, mini nuts are taller and stronger then mini nuts numbered 66650, 66652, and 66653 and made for situations where more
torque is required to prevent leaks.Due to their clean distinctive looks, many choose these for mounting their valve covers even though they don’t need their high-torque qualities. Nuts are 1-3/8” tall. Fits Chevrolet® small-block, big-block, and V6 with 1/4” x 20 threads. Each wing nut is supplied with a separate stud which permits precise gasket positioning on the head prior to mounting the valve covers. Four wing nuts per package, enough for one valve cover. Red 66652 shown in picture to the right. |
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66003 |
Chrome Valve Cover Hold Down Clamps
Fits Chevrolet® small-block V8 and V6/90° engines with stamped steel valve covers through 1986. By spreading the load over a wider area,
these clamps minimize distortion of the valve cover flanges, thereby decreasing the possibility of oil leakage. Eight clamps per
package, enough for two valve covers. |
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141-610 GM 12341986 |
Chrome Valve Cover Hold Down Clamps
Fits Chevrolet® small-block V8 and V6/90° engines through 1986. By spreading the load over a wider area, these clamps
minimize distortion of the valve cover flanges, thereby decreasing the possibility of oil leakage. Four clamps per package,
enough for one valve cover.(Plain) |
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141-903 GM 12341986 |
High-Tech Chrome Valve Cover Hold Down Clamps
Fits Chevrolet® small-block V8 and V6/90° engines through 1986. By spreading the load over a wider area, these clamps
minimize distortion of the valve cover flanges, thereby decreasing the possibility of oil leakage. Four clamps per package,
enough for one valve cover.(Red Bow Tie And Black Stipes) |
141-366 |
High-Tech Gray Epoxy Valve Cover Hold Down Clamps
Fits Chevrolet® small-block V8 and V6/90° engines through 1986. By spreading the load over a wider area, these clamps
minimize distortion of the valve cover flanges, thereby decreasing the possibility of oil leakage. Four clamps per package,
enough for one valve cover.(Blue Bow Tie And Red Stipes) |
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141-757 |
High-Tech Black Crickle Paint Valve Cover Hold Down Clamps
Fits Chevrolet® small-block V8 and V6/90° engines through 1986. By spreading the load over a wider area, these clamps
minimize distortion of the valve cover flanges, thereby decreasing the possibility of oil leakage. Four clamps per package,
enough for one valve cover.(Red Bow Tie And Red Stipes) |
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66291CC Chrome 66291BC Blue 66291BKC Black 66291RC Red |
Chrome Valve Cover Hold Down Girdle
Fits Chevrolet® small-block V8 stamped steel valve covers 1958 through 1986.
They easily drop into position. These revolutionary one-piece hold-downs are fast to install, eliminating fumbling with four
separate flange reinforcement clamps. By spreading the load over a wider area and additional downward pressure, these girdles
minimize distortion of the valve cover flanges, thereby decreasing the possibility of oil leakage. Four clamps per package.
Sold in pairs and they come in for different colors, chrome, blue, black, and red. These are solid and built to do the job.
Girdles are one-piece metal. The C on the end of the part numbers indicate they come in clear plastic clamshell packaging.
Both girdles in the package weight in at just under 3 lbs. (Chrome 66291CC shown in picture to the right.) |
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66292CC Chrome 66292BC Blue 66292BKC Black 66292RC Red |
Chrome Valve Cover Hold Down Girdle With Wire Looms
Fits Chevrolet® small-block V8 stamped steel valve covers 1958 through 1986.
They easily drop into position. These revolutionary one-piece hold-downs are fast to install, eliminating fumbling with four
separate flange reinforcement clamps. By spreading the load over a wider area and additional downward pressure, these girdles
minimize distortion of the valve cover flanges, thereby decreasing the possibility of oil leakage. Four clamps per package.
Sold in pairs and they come in for different colors, chrome, blue, black, and red. These are solid and built to do the job.
Girdles and Looms are one-piece metal with bolt on neoprene wire holders. The C on the end of the part numbers indicate they
come in clear plastic clamshell packaging. Both girdles in the package weight in at 3 lbs.(Chrome 66292CC shown in picture to the right.) |
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141-615 GM 12341988 |
Valve Cover Grommet Set
Grommet set, one for push-in air breather and one for PCV valve, 3” diameter. |
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141-133 GM 12397980 |
Valve Cover Hold Down Bolts
Bolt Kit for center bolt design valve covers P/N’s (GM 12497978, 12497979, 12497985; Proform 141-130, 141-131, 141-132) used on 1986 and newer Gen 1 and Gen 2 engines. This kit includes 8 chrome mounting bolts, 8 stainless steel washers, and 8 rubber washers, enough for two valve covers. This kit is the same as GM 12497980. |
No picture available yet. |
66001 |
Steel Reinforced Valve Cover Gasket Set
Racing valve cover Gaskets. Fits Chevy™ small block from 1958 to 86 with four rim mounting holes. Thin steel frame reinforced rubber gasket
resists blowout and allows for reuse after valve cover removal. (Two Gaskets per package.) |
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