X1or TR230 Valvesprings??
MTI RECOMMENDS the Manley's as that is what they sell in the X1 kit...either cam you go with I'd get the Manley's in case you want to upgrade to a bigger lift cam later on. Plus...they're good insurance for the lower lift cam...I'd rather be pushing a spring to 70% of what it can do than 85% or more ya know? Kinda like my new trans...I had it built to hold a 427 on gas and I've just got a H/C 346 on gas...again, in car terms I don't think overkill can ever be a bad thing...helps save time in the future normally.
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Buy the springs from them too....
I did...and I spin up to 6800 with no problems...and no float....
Its smart to use springs that a company packages with a cam....
maybe even get a double timing chain and a ported oil pump since you're gonna be in there and have to pull them anyways.





