Intake Manifold Casting Numbers
#1
Intake Manifold Casting Numbers
I need the casting numbers for a factory 4bbl intake manifold for an Olds 455. Looking for 1970 - 1971 non-EGR with the choke stove, many thanks.
#6
It would be nice if there was a deeper plenum, or more runner volume on the 4 speed unit.
According to my Mondello manual, the part #413111 (1973 455 4 bbl with egr) had a slightly larger "flow area" (2.68, as opposed to 2.50...whatever), as compared to the other non Toronado intake manifolds made by Oldsmobile.
Jim
#7
#8
Picked up my intake today, a very clean original piece and the correct number (404521) casting for my application! Thanks again for the help with getting the correct casting numbers!
Last edited by oldsonharmont; February 1st, 2010 at 04:28 PM. Reason: Updated
#9
intake manifolds bolts
HI In a related subject, I have a stock 1970, 455 Oldsmobile intake manifold and I purchased some bolts from Mondello's. There are three different sized bolts in the package. Question is, do you know there is a bolt pattern for these longer bolts go or should they will be the same size?
#10
No, actually the bolt lengths really aren'r related to an eight year old thread on casting numbers...
In any case, a stock iron 1970 intake should use bolts that are all the same length. Depending on your accessory brackets, you may or may not need one or two bolts with a threaded stud on the head. In some cases, the intake may be thinner at the bolt locations on either side of the heat crossover in the center of the intake. If so, use the shorter bolts there.
In any case, a stock iron 1970 intake should use bolts that are all the same length. Depending on your accessory brackets, you may or may not need one or two bolts with a threaded stud on the head. In some cases, the intake may be thinner at the bolt locations on either side of the heat crossover in the center of the intake. If so, use the shorter bolts there.
#11
No, actually the bolt lengths really aren'r related to an eight year old thread on casting numbers...
In any case, a stock iron 1970 intake should use bolts that are all the same length. Depending on your accessory brackets, you may or may not need one or two bolts with a threaded stud on the head. In some cases, the intake may be thinner at the bolt locations on either side of the heat crossover in the center of the intake. If so, use the shorter bolts there.
In any case, a stock iron 1970 intake should use bolts that are all the same length. Depending on your accessory brackets, you may or may not need one or two bolts with a threaded stud on the head. In some cases, the intake may be thinner at the bolt locations on either side of the heat crossover in the center of the intake. If so, use the shorter bolts there.
#12
Since we're dredging up an old thread here, I noticed the letter 'L' cast along the front runners on this 404521 intake. I'm asking if that's significant because the stock heater control valve had to be adapted to fit the 1/2" threaded port. Everything works as it should, I'm just curious what intake I ended up with here.
Last edited by oldsonharmont; March 12th, 2018 at 05:28 PM.
Thread
Thread Starter
Forum
Replies
Last Post
halfmoontrail
General Questions
11
January 25th, 2016 06:47 PM
Nickyloves442s
Parts For Sale
15
October 24th, 2012 04:55 PM