FC 13b counterweight confusion.

[alex1916v]

im after removing the flywheel to fit a different conversion flywheel to my \'89/\'90 FC 13B non turbo rx7,  i have found out the correct part number from Mazda as they are still available for £97 odd new... with a 3 week wait from japan.

now im in no rush for it, but i can get one slightly cheaper incl p+p from the USA...

http://www.ebay.com/itm/Mazda-RX-7-13B-13BT-Automatic-Engine-Rear-Counterweight-89-95-Turbo-NA-S5-FD-/221236494858?pt=Motors_Car_Truck_Parts_Accessories&hash=item3382b9020a&vxp=mtr

this one to be exact, since mines a 89/90 im a little unsure it is correct, there seems to be afew with the year groups > 89 then afew with 89 > so i want to be 100% correct if i do by second hand for cheaper!!

can anyone tell me if its defiantly the correct one, one or two people i have already asked online have come back with replies about s4 not fitting s5 etc but i dotn have a clue what they are on about, ive only just got into mazda\'s!

cheers for any help

[Skifledanabit]

is yours an automatic? I\'m pretty sure automatic and manual counterweights aren\'t interchangeable.

[alex1916v]

no, mine is a manual matey, the counterweight on a manual is cast into the stock flywheel, which im not planning on using, so i need the correct counterweight instead, the autos used them, as they dont use a flywheel.