If Phil sells it to you it'll fit.

I'd pressure test the Whole Cooling System...You've seen the bicycle Pump
apparatus with a Radiator Cap Adapter? I believe the expansion tank cap
(which is our "radiator cap") is rated for 1.4 bar. [1 bar is one atmospheric
pressure or 14.7 PSI.] so the system is rated for at least 20.5 PSI ?

Not to lay all this on you at once...
GSXR has a rule,that if he doesn't know the age of coolant system hoses on
an older model...They All Go.

I'm planning to replace them all before the crank turns again.(18 years old)
'cheap insurance and peace of mind.

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'84 300SD sold
124.128