where to buy 4200 spring

[fatstack]

Where can i buy a 4200 rpm spring off the internet other than ebay? Thanks

[oldestof11]

Might be better off finding a local pump shop. Paid $14.99 for mine.

[fatstack]

Hell ya. Bosch shop correct?

[Tsbourne09]

Agreed. Ebay... Just search on google theres like 14985 places that sell them...

[fatstack]

Sorry im still having no luck finding one. Any site vendors have them ? Thanks

[CumminsPower59]

Find a shop that does pump work and give them this number, they can look it up in a Bosch parts book. 1-464-650-354 is the part number for the spring...

Hope this helps ya!

[oldestof11]

My suggestion is you DON'T tell tthem what it is for. They may not sell it to you otherwise.

[CumminsPower59]

That's what I ran into when I went to get mine, the young guy behind the counter started asking alot of questions, and harping that "stock is best" then the old guy (owner) heard our conversation, came out of the office and looked out the front window, seen the truck and said "I can get you what you need" and sold it to me with a smile Now I only talk to the owner of the shop, he likes old stuff that goes fast too, real nice guy!

[PToombs]

They have to follow that "stock is best" line. I think it's a required line to learn by Bosch.

[fatstack]

Bought a 4000 rpm spring from diesel auto power today with overnite shipping for install this weekend yeehaw!!! Will disclose the results...

[oldestof11]

It will be disappointing. First you will learn you need a darn good lift pump to hit 4k then find out you need valve springs either the easy way of us telling you or the hard way of needsing new valves and/or pushrods.

The extra rpms and throttle sensitivity is what I like most about it.

[fatstack]

I hear that. Im just anticipating the added throttle sensitivity over the already awesome 366 spring

[rattlebox93]

366 spring TOTALLY SUCKS after running the clipped 4200 i love mine!!!!! I did take it back out for milage tho i think it gets gpm instead of mpg with it!

[Kasper Cummins]

366 spring TOTALLY SUCKS after running the clipped 4200 i love mine!!!!! I did take it back out for milage tho i think it gets gpm instead of mpg with it!

That might just be from the way you drive it.

[rattlebox93]

366 spring TOTALLY SUCKS after running the clipped 4200 i love mine!!!!! I did take it back out for milage tho i think it gets gpm instead of mpg with it!

That might just be from the way you drive it.

Well yeah but why would i have the big spring and not run the sthi out of it! Lmao but really with the 6x16s and te 4200 there is no driving around the smoke that would make an old coal burning steam engine feel like a sissy