GM Performance 141-366 high tech grey valve cover hold down clamps for Chevy small block engines. Features the Bowtie logo. Provides more clamping force for a better valve cover seal. Sold as a pack of 4 valve cover hold down clamps. Order 2 packs for a complete set. GM Performance 141-366 grey Chevy small block valve cover hold down clamps 141-366 We welcome CANADIAN customers! For ordering information, click on "Orders To Canada" at the top left side of this page. PAYMENT METHODS: PayPal, Visa, Mastercard, Discover, American Express, money orders.