PRODUCT DETAILS
TiAL Sport MVR 44mm Wastegate
If your boost creeps, spikes, or won't hold a steady target, the wastegate is where you fix it. The TiAL MVR is the modern evolution of the legendary V44, same compact size that fits tight engine bays, but it flows harder and handles heat better, which is exactly what matters during back-to-back pulls and long track sessions. Consistent boost control beats re-chasing your tune every time conditions change, and that consistency is what this gate delivers.
What A Wastegate Actually Controls
Worth understanding, because it's the root of the problems people buy this to solve.
An external wastegate bleeds exhaust away from the turbine to control how much boost the turbo makes. When a gate can't flow enough, or can't respond consistently, you get the classic symptoms: boost creep (pressure climbing past your target as RPM rises), spikes, and a target the car just won't hold steady.
A properly sized, properly flowing gate solves that by bleeding off exactly the exhaust needed to hold your target. The MVR's job is to make your boost predictable, which is what makes a car tunable and drivable at the limit rather than a moving target.
50 lb/min Of Flow, Where It Counts
The number that matters, and the conditions it's rated under.
The MVR flows up to 50 lb/min, and TiAL rates that at 30 PSI with full valve stroke at 1800°F. That temperature spec is the important part, it's rated at the genuinely ugly exhaust heat a hard-working turbo setup actually produces, not a lab-cool number that falls apart in the real world.
Cheaper wastegates behave inconsistently as they heat soak, which is exactly when you need them to work, deep into a session with everything under the hood glowing. The MVR is built and rated to hold its behavior at that heat, which is where its consistency reputation comes from. It's a 44mm valve with a 0.3 to 1.5 BAR pressure range.
Coolant Ports Keep It Consistent When Hot
A key feature for anyone running sustained load.
The housing has integrated coolant ports that pull heat away from the diaphragm area. The diaphragm is the part that actually references your boost pressure, and when it heat soaks, boost control drifts, which is how a gate that worked fine on the first pull gets erratic by the fourth.
Running coolant through the gate keeps the diaphragm area at a stable temperature, so your boost control stays consistent whether it's the first pull or the last lap of a long session. On a track car especially, that thermal stability is the difference between a gate you trust and one you watch nervously.
Direct V44 Replacement
Important if you're upgrading an existing setup.
The MVR uses the same V-band flange arrangement as the V44 and is a direct, fully compatible replacement. If your current setup was fabricated around a V44, you can swap to the MVR without redoing your exhaust plumbing or fab work, the flanges match, so it bolts in where the old gate came off.
That makes it an easy upgrade path: keep your existing plumbing, gain the MVR's improved flow and heat handling.
Precision Machined In The USA
TiAL engineers and precision machines the MVR in the USA, and that quality shows in how repeatable it feels once it's set up. A wastegate is a precision part, small variations in machining and materials show up as inconsistent boost control, and TiAL's manufacturing is a big part of why these are the reference standard for external gates. You're buying control and consistency, not a horsepower claim, and that's exactly what a good wastegate should sell.
Five Colors
Available in silver, blue, black, purple, and red anodized finishes. Black is the stealth choice if you want the gate to disappear in the bay; purple and red make a statement if you want it seen. All five are identical in function, so pick the finish that suits your build.
What's In The Kit
- TiAL MVR wastegate assembly
- Valve seat
- Air fitting set
- Coolant fitting set
- Inlet and outlet flanges and clamps
- Wastegate springs
The kit comes complete with the flanges, clamps, fittings, and springs to plumb and install it. Match the included spring to your target boost, or swap in a different rate spring for your setup.
Specifications
- Valve diameter: 44mm
- Maximum flow: 50 lb/min
- Pressure range: 0.3 to 1.5 BAR
- Flow at 1800°F, full stroke: 50.0 lb/min at 30 PSI
- Flange: V-band, fully compatible with TiAL V44
- Coolant ports: integrated for diaphragm cooling
- Colors: silver, blue, black, purple, red
Who Should Grab This
This is for anyone whose boost creeps, spikes, or won't hold target, and for anyone building a turbo setup who wants boost control that stays consistent through a full session rather than drifting as things heat up. Proper flow, coolant-cooled for thermal stability, a direct V44 replacement, and precision machined in the USA. Pick your color, match your springs, and get boost you can trust lap after lap.
Valve: 44mm. Flow: up to 50 lb/min (50.0 at 30 PSI, 1800°F full stroke). Pressure range: 0.3 to 1.5 BAR. Flange: V-band, direct V44 replacement. Cooling: integrated coolant ports. Colors: silver, blue, black, purple, red. Includes: wastegate, valve seat, fittings, flanges, clamps, and springs. Made in: USA.
SKUs: TIL-001930 (silver), TIL-002948 (blue), TIL-002949 (black), TIL-002950 (purple), TIL-002951 (red).
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