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A muffler delete is typically the lowest-cost option. However, it is inexpensive for a reason and often results in a harsh, tinny exhaust note. While it is frequently promoted online as a quick and cheap solution, a muffler delete can create potential issues, including adverse effects on engine performance due to altered exhaust back-pressure, as well as compliance concerns when it comes to WOF inspections. For these reasons, we generally only recommend a muffler delete if you have access to a particularly lenient WOF inspector, and we strongly advise against presenting the vehicle to AA or VTNZ for inspection with this modification.
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Often, for only a small additional cost, you can upgrade to a high-flow sports muffler, which delivers a significantly better exhaust note, remains WOF-compliant, and comes with a 2-year warranty.
Thinking about a muffler delete?
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Muffler Delete
Pros
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Lowest upfront cost
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Louder exhaust note
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Quick and simple modification
Cons
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Often produces a harsh or tinny sound
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Can negatively affect engine performance due to altered exhaust back-pressure
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High risk of failing WOF inspections
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Not recommended for inspections at AA or VTNZ
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No warranty or long-term reliability benefits
Did you know?
High-Flow Sports Muffler
Pros
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Deeper, higher-quality exhaust sound
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WOF-compliant when correctly installed
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Maintains proper exhaust flow and engine performance
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Stainless steel construction for durability
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Comes with a 2-year warranty
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Better long-term value
Cons
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Slightly higher upfront cost compared to a muffler delete
