Nissan KA24DE Race Spring Set KVS24 ts-0554-1012 Genuine Hitachi-Astemo ignition coils which

Genuine Hitachi-Astemo ignition coils which are rated to 400hp per cylinder

High performance multi layered Silicone hose

There is also a valid argument for the use of a similar metal when it comes to the main caps and expansion/contraction of dissimilar metals when you consider a billet cap

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Nissan KA24DE Race Spring Set KVS24 ts-0554-1012 Genuine Hitachi-Astemo ignition coils which80lb seat pressure at 34. 90mm installed height. 185lb at 23. 9mm open height. Suits OEM retainer. NISSAN KA24DE. High performance PACALOY drop in single valve spring set. Use with OEM retainer and spring base. 80lb seat pressure at 34. 90mm installed height. 185lb at 23. 9mm open height. Coil bind 20. 30mm. Maximum valve lift is 13. 50mm.