The best documented T4 twin-scroll options in this list are the S480 and S488 turbos, which specify a T4 twin-scroll configuration. The GT45 listing also names a twin-scroll design, but provides fewer details. The two maXpeedingrods turbos are T4-family alternatives, not confirmed twin-scroll units. Check flange, engine, and setup compatibility before choosing any turbo.
| Product | Best For | Key Detail |
|---|---|---|
| Billet S480 | Buyers comparing an 80 mm compressor option | T4 twin scroll, 1.25 A/R hot side |
| S488 | Buyers seeking a larger listed turbine wheel | 96/88 mm turbine wheel |
| GT45 | Buyers considering a GT45-style turbo | Anti-surge, twin-scroll, T4, V-band |
| maXpeedingrods Street JD | Buyers comparing a general T4 turbo | Twin-scroll configuration not stated |
| maXpeedingrods Basic VL | Buyers comparing a T3/T4 alternative | Not listed as twin scroll |
Billet Turbo Charger S480 80mm
This is the clearest match for a buyer specifically searching for a T4 twin-scroll turbo. Its listed configuration includes an 80/117.5 mm billet compressor wheel with 7+7 blades, a 1.25 A/R hot side, and a 360-degree thrust bearing. The housing has a 5-inch ported air inlet and a 4.21-inch charge-pipe outlet.
Best for: Builds where the buyer wants the stated S480 size, twin-scroll T4 format, and listed compressor dimensions to compare against a planned setup. It was selected because its core configuration is explicitly identified in the product name and details.
Check before buying: Confirm the hot-side flange, exhaust manifold, and piping dimensions match the build. The listing does not provide a vehicle-specific fitment guarantee.
S400 S488 T4 Twin-Scroll Turbo
This S400 S488 listing identifies a T4 twin-scroll setup and a 96/88 mm turbine wheel made from cast Inconel. It also gives interchange part number 171702. Those details make it useful for shoppers comparing a larger listed turbine wheel or checking a possible replacement by part number.
Best for: Buyers whose turbo selection is based on the stated S488 designation, wheel dimensions, or interchange number. It was chosen because it directly names the T4 twin-scroll configuration.
Check before buying: The supplied details do not include compressor-wheel dimensions or a vehicle application list. Verify the complete specifications and mounting requirements for the intended engine and manifold.
GT45 Anti-Surge Twin-Scroll Turbo
The product name describes this unit as a GT45 turbo with an anti-surge design, twin-scroll layout, T4 connection, and V-band. These named features make it a relevant option for shoppers comparing a GT45-style turbo with the S400 models above.
Best for: Buyers who specifically want to investigate a GT45 listing with the stated T4 twin-scroll and V-band features. It was selected because the title directly matches the main search terms.
Check before buying: The supplied product information does not state wheel dimensions, A/R, or other detailed specifications. Confirm those details and flange requirements rather than assuming they match another GT45 turbo.
maXpeedingrods Street JD T4 Turbo
This maXpeedingrods Street JD model is listed as a T4 turbo with a billet compressor wheel and an advertised capability of up to 600 horsepower. The feature list names a range of 4.0L–6.0L engines and several vehicle applications. It also describes a silicon-molybdenum turbine housing and an upgraded alloy turbine wheel, with stated temperature figures in the listing.
Best for: Buyers comparing a general T4 turbo and vehicle or engine claims listed for this model. It is included as an adjacent option, not as a confirmed twin-scroll recommendation.
Important limitation: The provided details do not identify a twin-scroll housing. Avoid choosing it for a twin-scroll manifold until the seller confirms the scroll configuration and exact fitment.
maXpeedingrods Basic VL T3/T4 Turbo
This Basic VL listing describes a T3/T4 T04E turbo with gaskets for 4- or 6-cylinder, 1.5L–2.5L engines. It names applications including certain Honda Civic, CRX, and BMW 318i model years. Those details distinguish it from the larger S400 and GT45 choices.
Best for: Shoppers comparing a T3/T4 turbo for an application described in the listing. It is included as a nearby T4-family alternative, rather than a verified twin-scroll product.
Important limitation: The supplied details do not state that this turbo uses a twin-scroll turbine housing. Confirm housing and manifold compatibility before treating it as a match for a T4 twin-scroll setup.
Buying Guide: Choosing A T4 Twin-Scroll Turbo
Does T4 mean twin scroll?
No. T4 identifies a turbine inlet flange style, while twin scroll describes how the turbine housing separates exhaust flow. A T4 turbo can be single-scroll or twin-scroll. Check that the listing explicitly identifies both features and that the exhaust manifold is designed for the same layout.
Which specifications should you compare?
- Compressor and turbine dimensions: Compare stated wheel measurements with the engine build and intended use.
- A/R and housing: Check listed A/R, turbine housing type, and flange details; do not assume these match across S480, S488, or GT45 models.
- Connections: Confirm inlet, outlet, downpipe, and V-band or other mounting requirements.
- Application evidence: Treat engine and vehicle claims as listing-specific. Verify the exact part and configuration before purchase.
Should you choose an S480, S488, or GT45?
Use the listed measurements and build requirements to compare them; the product names alone do not establish which turbo will perform best on a particular engine. The S480 listing provides compressor details and a 1.25 A/R hot side. The S488 listing specifies a 96/88 mm turbine wheel. The GT45 title identifies anti-surge, T4, twin-scroll, and V-band features, but the supplied details are limited.
Frequently Asked Questions
What is a T4 twin-scroll turbo?
It is a turbo with a T4-style turbine inlet flange and a divided twin-scroll turbine housing. Both the turbo and exhaust manifold must suit the intended divided-flow arrangement.
Are all five products confirmed as twin scroll?
No. The S480, S488, and GT45 listings name twin-scroll features. The supplied details for the two maXpeedingrods models do not confirm twin-scroll housings.
Can I use a T4 turbo with any T4 manifold?
Not automatically. Confirm the flange, scroll layout, port arrangement, and other mounting dimensions; a T4 label alone does not confirm full compatibility.
What should I verify before ordering?
Confirm the turbo’s exact model, wheel and housing specifications, flange style, scroll configuration, and fitment for the engine and manifold. When a detail is missing from the listing, request clarification before buying.