Page 87 of Master Jaguar Catalog by XKs Unlimited

b c d limited to suppl on hand y d-type cam cover replica set of two 1 598 7-1 b c-type cam covers in polished aluminum are modified reproduction standard items from our sources in england allow eight weeks delivery c-type cam cover replica set of two 1 565 7-1 also see page 27 for alloy flip-up oil filler cap available alone c tappet guide hold-down a correctable weakness in the xk jaguar cylinder head is tappet guide movement under the stress of high rpm racing applications or even with just a lot of miles the tappet guides can work loose these guide hold-downs are the ounce of prevention needed to hold the guides in place complete set as shown top the inset photo above illustrates the placement of the hold-down tappet guide hold-down set 1 580 7-1 large tappet/guide set 24-pieces 1 7-3589 d lightweight tappet master engine builders around the world work hard to reduce reciprocating mass in their engines a key to lightening is the use of lighter tappets xks brings you these lightweight high performance pieces at a 40 savings weighing only 36 grams vs 56 std they are 0.050 thick and standard diameter six-cylinder lightweight tappet each 1 7-3582 e f g xk 6-cyl v-12 set for xk 6-cyl only e after you ve selected the proper cam for your application you need to ensure the rest of the valve train will be up to the task xks valve spring sets are supplied by a major manufacturer for our use these springs eliminate float and bounce at high rpm resulting in constant power delivery xks springs can be used with any of the cams listed in this catalog and must be used with our hi-performance cams 6 cylinder valve spring set 6 cylinder valve spring set high lift v-12 valve spring set 1 589-6 7-1 1 589-7 7-1 1 589-12 7-1 f the piston engine is a glorified air pump the more air you can push through it the more power it will develop a key element to more air is bigger valves turn to xks for more power by increasing valve size and with a proper performance valve job you can expect an increase of 35hp from 2500 rpm and up xks provides you with stainless steel precision valves intake 1.75 valve each intake 1.8 valve each intake 1.875 valve each exhaust 1.622 valve each exhaust 1.625 valve each 1 7-3550 1 7-3549 1 7-3580 1 7-3548 1 7-3551 g stronger and lighter these chromemoly performance valve spring retainers have other advantages as well their precise manufacturing eliminates the tendency for the retainer to ride up over the keepers lifting the valve shim off the valve allowing the possibility for all sorts of calamity these are a must for high rpm race applications and advised for any street overhaul as well these retainers are suitable for all xk engines from 948-1 987 they allow fitment of valve 1 969 engines as well stem seals to pre-1 performance valve spring retainers each co-27480 850 fiero lane san luis obispo ca 93401 u.s.a 83 v al ve train b d-type replica polished aluminum cam covers are available as shown the oil filler cap is standard with this set d large diameter tappet tappet guide set typically a billet cam has a lobe wider than the standard tappet diameter by machining the head to accept the larger diameter steel tappet guide set not shown the engine builder can then install these larger diameter tappets for xk 6-cyl engines only.

[close]