About this guide
A top-mount SR20DET manifold is a fabrication part, not a universal bolt-on. Turbo inlet, wastegate flange, steering side, A/C and power-steering clearance, downpipe routing and the chassis around an S13/S14/S15 or swap all matter. Confirm the exact engine, chassis, turbo and wastegate with the fabricator before ordering.
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The picks, in detail
Mazworx SS Series SR20DET/VE RWD Top Mount Turbo Manifold
A RWD SR20DET or DET-with-VE-head manifold with a V-band turbine inlet and TiAL 44/MVR wastegate flange.
- Garrett G25–G35 and GTX30–GTX35 V-band fit
- clears A/C and power steering
- billet collector
- specific RWD fitment
- VE-head provision
- back-order status
- not for arbitrary T3 turbos
Future Fab Nissan SR20DET V-Band Top Mount Manifold
A configurable LHD S13/S14 top mount with selected V-band and wastegate hardware.
- 1¼-inch SCH40 runners
- 38 mm or 44 mm wastegate option
- T3 option available
- detailed chassis clearance guidance
- made to order
- RHD ABS requires the 38 mm wastegate option
- turbo flange must be selected
ISR Performance RamHorn Top Mount Manifold MVR SCH40
An S13/S14 T3 setup with a 44 mm MVR wastegate flange and clearance for A/C and power steering.
- Schedule 40 piping
- T3 turbine flange
- 44 mm MVR wastegate flange
- defined S13/S14 application
- thick-wall construction
- sale listing may be unavailable
- not a V-band turbine inlet
Japanese Race Supplies SR20DET Turbo Manifold – Top Mount
A T3 steam-pipe manifold whose forward-facing external-gate flange needs alteration for most applications.
- 3 mm wall
- 42 mm pipe
- T3 top mount
- explicit external-gate layout
- wastegate flange needs alteration for most applications
- downpipe is build-specific
Finebiz Performance S13/S14/S15 SR20DET Top Mount Turbo Manifold
A stainless high-mount choice for T3, T4 or T3/T4 flanges with a 35/38 mm two-bolt wastegate flange.
- 2.7 mm pipes
- TIG-welded
- gaskets and bolts included
- multiple turbine-flange choices
- S13/S14/S15 stated fit
- wastegate limited to listed flange
- verify local-market price and shipping
CX Racing MF-SR20DET-TOP-WT
A T3 top-mount option listed for 1989–1994 240SX S13/S14 chassis with S13/S14 SR20DET.
- 11-gauge construction
- T3/T4 description
- SR20DET swap application
- lower-cost listed option
- specific item code
- older S13-era application
- confirm turbo and wastegate hardware
CX Racing MF-SR20DET-TOP-2-WT
A 1989–1999 S13/S14 SR20DET top-mount listing with T3/T4 wording.
- 11-gauge construction
- S13/S14 fit
- top-mount layout
- specified 1989–1999 range
- distinct item code
- flange wording requires confirmation
- downpipe is not included
SSAutoChrome Nissan S13/S14/S15 SR20DET Top Mount Manifold
A 321-stainless top mount listed for S13/S14/S14a/S15 SR20DET and 240SX SR swaps.
- T3/T4 or T4 application
- 40 mm four-bolt wastegate flange
- 321 stainless
- covers multiple SR chassis
- wastegate and dump-tube package description
- confirm the supplied components
- turbine flange must match the selected turbo
XS Power SR20DET SR20 Top Mount Turbo Manifold Nissan T3 T4 TiAL 38 S13 S14
A T3/T4 top-mount listing for S13/S14 SR20 applications with TiAL 38 hardware in its description.
- T3/T4 application
- S13/S14 fit in listing
- TiAL 38 wording
- broad listed price range
- explicit SR20 top-mount listing
- verify components in selected configuration
- not interchangeable with V-band setups
What each one costs
Typical price, cheapest first. Tap a name to jump to that pick and its buy link.
Compare any three
| Mazworx SS Series SR20DET/VE RWD Top Mount Turbo Manifold | Future Fab Nissan SR20DET V-Band Top Mount Manifold | ISR Performance RamHorn Top Mount Manifold MVR SCH40 | |
|---|---|---|---|
| Price | $1,499 | $899 | $731.50–$770 |
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Buying tips
- Match the turbine inlet before buying the manifold.
- Plan the wastegate and downpipe together.
- Check steering, brake-line, A/C and power-steering clearance on the exact chassis.
- Use a qualified fabricator for exhaust and heat management.
As an Amazon Associate and eBay Partner, toptenpick.com earns from qualifying purchases. Prices and availability are subject to change.