What This Hose Is and Where It Goes
This is the molded silicone intake hose that connects your turbo outlet or charge air piping into the intake manifold on Mack E6, E7, and MP engines. The 5-hump design with 6 reinforcement rings lets it flex and absorb engine movement without collapsing under boost, which is exactly why the factory didn't just run a straight rubber coupler here.
At 4" ID and 7.125" length it's a specific fit — not a universal coupler you trim to size. Wrong length and you're either stretching clamps past where they seal or you've got slack that turns into a boost leak and a check engine light for low turbo pressure.
Silicone construction handles the heat cycling under the hood better than straight rubber over the long haul, and that's the whole reason Mack speced this material in this location to begin with.
How the Cross Numbers Line Up
45MD413M3 is the Mack number stamped on the OE part, and 45MD414M3 shows up as a running running mate to it — sometimes a running change or a slightly different rev of the same physical hose. EIH1993 and PAI1993 are aftermarket manufacturer part numbers that reference this exact hose spec, same ID, same length, same hump/ring count.
The reason these all cross is the hose geometry doesn't change — 4" ID, 7.125" length, 6 rings is 6 rings. Where you get burned is if your truck actually has a running change to a different length or ID mid-production, so a number that looks close on paper doesn't seat right on your pipe.
Before you order, pull the old hose and check the ID and overall length yourself, or find the number cast/printed on the hose itself if it's legible. Don't just match by engine family — Mack ran enough variations across E6/E7/MP that the safe move is comparing physical dimensions.
Ordering From PartStop
We stock this hose at the Tacoma counter for guys who blow one on a Friday afternoon and need the truck moving Monday. Same-day pickup if you're local, and we ship nationwide if you're not standing in front of us.
Every hose we sell carries our 6+ month warranty. If it's not right for your application or something's wrong with the part, we deal with it — no runaround.
Give us your VIN or the number off the old hose before you order if there's any doubt. Saves you a return shipping label and saves us the hassle too.
45MD413M3 Cross-Reference & Interchange Numbers
These manufacturer and aftermarket numbers commonly cross-reference to 45MD413M3. Use them to identify the part — then confirm the exact fit by VIN or the number stamped on your old unit before you order. An interchange is a starting point, not a fitment guarantee.
| Brand / Line | Cross-Reference Numbers |
|---|---|
| OE/Cross-Ref | 45MD414M3, EIH1993, PAI1993 |
Frequently asked questions
Does 45MD413M3 fit my Mack truck?
Depends on the engine and the exact intake piping configuration on your truck — E6, E7, and MP series covers a lot of production years. Surest way to confirm is by VIN or by pulling the old hose and checking the ID, length, and hump/ring count against what's listed here. Don't guess off engine family alone.
Is this the same as the EIH1993 hose?
EIH1993 is an aftermarket part number that cross-references to this same hose spec — 4" ID, 7.125" length, 6 reinforcement rings. It's built to the same dimensions but it's not a Mack-branded part. Compare your old hose's measurements to be sure before ordering.
Why does this hose have rings inside it — can I just use a plain silicone coupler instead?
The wire rings keep the hose from collapsing under boost pressure and engine vibration in that 5-hump shape. A plain straight coupler doesn't have the flex geometry to handle the offset between the turbo outlet and manifold, so no, don't substitute it — get the correct length and ring count for this application.
Not sure it fits? We check before you pay.
Run your VIN and we’ll match parts to your exact truck, or call the counter — a person who knows trucks verifies fitment by OEM number before the order ships. No wrong-box returns.
More cross-reference guides
Need the part, not just the reading?
Every part below is a Premium Quality aftermarket Direct Replacement with published OEM cross-reference numbers, a 6+ month warranty and same-business-day shipping from Tacoma, WA. Not sure it fits? Run your VIN — or call and a person who knows trucks will verify fitment before you pay.