Tuning companies often talk about stage 1,2 and 3 mods. But what are these mods and what do they mean?
These stages are often meaningless terms when applied to power gains as they can’t reliably be used to explain how much power a mod actually adds. Between stage 1,2 and 3 there is no consistent different between their classifications. However, there are some points which differentiate a ‘typical’ mod in each stage.
Stage 1 Modifications
A true stage 1 modification doesn’t require any other engine mod to get it to work, this means it can be added in isolation. Other mods can help to raise the power gains and realise the potential of the mod, they aren’t mandatory. These are at the bottom of the tuning scene in terms of the overall benefits you will receive. Stage 1 modifications are usually a straightforward DIY fit, they should also work on a standard engine that’s in good condition.
Some examples of Stage 1 mods include panel air filters, sports exhausts and fuel pressure regulators.
Stage 2 Modifications
Stage 2 mods tend to offer larger power gains than stage 1 but will require additional work on other parts if you want them to work reliably. Like stage 1, stage 2 mods are usually a DIY fit but will require more specialist knowledge and tools.
Some examples of stage 2 mods include aggressive remap that requires a stronger turbo, sports exhaust requiring new headers and internal mods requiring fuel to be uprated.
Stage 3 Modifications
Stage 3 modifications are known by most as a track day modification. Similarly, to stage 2, they will also require other mods to support them but they are usually less ideal for road use due to there aggressiveness. A stage 3 modified car will need to be regularly overhauled and serviced.
Some examples of stage 3 mods include aggressive cam profiles, heavy competition clutch and ultralight flywheels.
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