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SI GUIDES AFTER MARKET USA
Same guides as Jim at Resto. Silicon bronze guides. BEST PRICING IN SETS OF 8 In photo Intake on top/Exhaust below. Nissan guides were mediocre brass and standard on the OD not providing adequate press for re-installation. Proper guide press fit is essential in rebuilds. Losing a guide in older engines is more common depending on how many rebuilds have been performed. These guides are slightly oversize on the O.D. to provide the correct press fit.
AFTERMARKET USA MACHINED - HIGH NICKEL MANGANESE SILICON BRONZE BROACHED ID MATERIAL FROM GERMANY
Oversize guides available are .004 on the ODContact us prior topurchasing.
The longer, tapering, angle toward the end of the guide is the intake guide.
To order the intake or exhaust guides separately in (sets of 4) use the following part numbering and pricing.