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Performance springs are scragged individually to ensure each spring is to solid height before checking, unlike most that are scragged to a height somewhere close to solid.\u003c\/p\u003e\n\u003cp\u003ePerformance valve spring wire is also double eddy current tested to a depth of 40 microns and any wire detected with flaws is sprayed, the coiling machine picks this up and rejects these sections.\u003c\/p\u003e\n\u003cp\u003ePerformance valve springs are also rattle tested on a specially designed machine which we can put a cam lobe into and run a complete set up (lifter, spring, retainer, push rod, rocker and valve) and check for harmonics.\u003c\/p\u003e\n\u003cp\u003eAdd to all this, the fact that Performance valve springs are also designed on SRAMA, a computer program from the Institute of Spring Technologies which gives us all stress and pound loadings from installed height to coil bind.\u003c\/p\u003e","brand":"Tuna Racing","offers":[{"title":"Default Title","offer_id":45799355449582,"sku":"PS 10084 Spring V.S.I B-104 .030 Shim","price":299.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0676\/9878\/6542\/files\/3rz-performance-valve-springs-4252424.jpg?v=1766901187"},{"product_id":"3rz-injector-cups","title":"3RZ injector cups","description":"\u003cp\u003e3RZ injector cups.\u003c\/p\u003e\n\u003cp\u003eThese injector cups replace the factory Bakelite cups in the head and allow the use of a standard 14mm lower injector o-ring when using aftermarket injectors.\u003c\/p\u003e\n\u003cp\u003eSpacers and\/or the removal of the factory spacer may be required depending on the final length of the injector you choose.\u003c\/p\u003e\n\u003cp\u003eSold as set of 4\u003c\/p\u003e","brand":"Tuna Racing","offers":[{"title":"Default Title","offer_id":46583258185966,"sku":"","price":79.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0676\/9878\/6542\/files\/3rz-injector-cups-1858849.jpg?v=1766901126"},{"product_id":"3rz-arp-head-studs","title":"3RZ ARP head studs","description":"\u003cp\u003eARP head stud kit to suit Toyota 3RZ\u003c\/p\u003e","brand":"Tuna Racing","offers":[{"title":"Default Title","offer_id":46583547199726,"sku":"Platinum ARP-3RZ-HSK","price":335.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0676\/9878\/6542\/files\/arp-headstud-and-mls-gasket-kit-6553421.jpg?v=1766901129"},{"product_id":"3rz-genuine-bakelite-injector-cups","title":"Genuine Toyota 3RZ Bakelite Injector Cups","description":"\u003cp\u003e3RZ genuine Bakelite injector cups and o-rings.\u003c\/p\u003e\n\u003cp\u003eSold as set of 4\u003c\/p\u003e","brand":"Toyota","offers":[{"title":"Default Title","offer_id":47065405784302,"sku":"9056110018 cup 9030119006 oring","price":39.0,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0676\/9878\/6542\/files\/IMG-8675.heic?v=1760523503"},{"product_id":"genuine-distributor-blanking-cam-plug-for-toyota-3rz","title":"Genuine Toyota 3RZ Distributor Blanking Cam Plug","description":"\u003cp\u003eGenuine replacement plug for distributor hole on wasted spark cylinder heads\u003c\/p\u003e","brand":"Toyota","offers":[{"title":"Default Title","offer_id":47241045573870,"sku":"9033936001","price":11.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0676\/9878\/6542\/files\/genuine-toyota-3rz-distributor-blanking-cam-plug-4008278.jpg?v=1766901126"},{"product_id":"arp-headstud-and-mls-gasket-kit","title":"ARP Headstud and MLS Gasket Kit","description":"\u003cp\u003eThe first step to increasing the boost on your stock 3RZ is ARP head studs and a cometic MLS Head gasket.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Tuna Racing","offers":[{"title":"96mm Bore - 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