EVIL ENERGY LS Turbo Exhaust Manifold & Headers For LSX, LS1, LS2, LS3, LS6 (1 3/4-inch Primaries)

Q: Are the LS turbo headers sold as a pair?

A: Yes. The kit includes both the driver side and passenger side headers, a four-port head gasket for each, two V-band clamps, two cast V-band-to-T3 turbo adapters and mounting bolts.

Q: Are these LS turbo headers a complete bolt-on turbo kit for my Silverado or Camaro?

A: No. They are the foundation of a custom turbo system. You still need the turbocharger or turbochargers, a crossover pipe for a single turbo, wastegates, downpipes, oil feed and return lines, an intercooler and piping, fuel system upgrades and a tune. Plan the full parts list before you start so the headers, turbo placement and intercooler routing all work together.

Q: Can I run a single turbo with these forward facing up LS headers?

A: Yes. Mount one T3 adapter on the side where the turbo will sit, and run a crossover pipe from the other header's V-band collector over to it. The V-band outlets make it easier to build and remove the crossover. For a twin turbo setup, use both T3 adapters and mount a T3-flanged turbo on each bank.

Q: Which GM engines do these turbo headers bolt to?

A: They fit Gen III and Gen IV LS V8 engines with the standard LS exhaust bolt pattern: the LS1, LS2, LS3, LS6 and LSX, plus the 4.8L, 5.3L, 6.0L and 6.2L truck engines. The truck engines are a common choice for budget LS turbo builds because used ones are easy to find.

Q: Will the LS turbo headers clear the steering and frame in my car or truck?

A: That depends on the chassis, motor mounts and engine position, so there is no single answer. Universal LS turbo headers often need small adjustments; one owner who installed similar 1-3/4 in forward-facing turbo headers in a 1979 Camaro with an LS swap had to dent one side for steering clearance. Bolt the headers on with the engine in place, turn the steering lock to lock, and check the frame, steering shaft, A/C lines and alternator before ordering the rest of the hot side.

Q: Do the LS turbo headers have a wastegate port?

A: No wastegate flange is welded to the headers. Use turbos with internal wastegates, or add an external wastegate on the crossover pipe, a collector or the turbine adapter area when you build the hot side. Place the wastegate where it sees exhaust flow from all the cylinders feeding that turbo.

Q: What turbo inlet do the included adapters fit?

A: The cast adapters bolt to a turbo with a T3 rectangular turbine inlet flange, the most common inlet on budget and mid-size turbos. If your turbo has a T4 inlet or a V-band turbine inlet, you will need a different adapter, or you can connect a V-band inlet turbo directly to the header collector with a matching V-band flange and clamp.

Q: How do I keep stainless turbo headers from cracking?

A: Turbo headers crack mostly from two loads: the weight of the turbo hanging on the collector and the engine twisting against a rigid exhaust. Brace each turbo to the engine block or a solid bracket, use flex sections in the downpipes and any wastegate dump tubes, and let the exhaust hang from rubber isolators. After the first few heat cycles, recheck the header bolts and V-band clamps.

Q: Do I need a tune with the LS turbo headers?

A: Yes, for the turbo build as a whole. A turbocharged LS needs a tune for boost, fuel and timing, larger injectors and a fuel pump that can supply the added airflow. Running boost on a stock calibration risks a lean condition and engine damage.

Q: Are these LS turbo headers street legal?

A: They are intended for off-road and racing use. They do not carry a CARB Executive Order number, so on a California-registered vehicle they will fail a smog check visual inspection, and adding a turbo system to an emissions-controlled vehicle is generally not legal on public roads under federal anti-tampering rules.