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Exhaust Upgrade

The original exhaust system was straight from the Toyota iQ (it even has Toyota stamped on the tip). While cat-back systems are available from commercial sources they are limited to a single tip with flow through muffler. R-Tec Auto Design have previously installed a twin tip exhaust system onto a Cygnet, and a similar system was installed onto KM12ZSZ. However, the original choice of tip looked rather large for the car and a smaller more discreet size with a more muted sound was retro-fitted by ProFab. In order to see the effect of the high flow twin tip exhaust as compared to the standard system The Tuning Company in Swansea put KM12ZSZ on the dyno. The standard exhaust showed a power of 98.0 bhp @ 6000 rpm and a torque of 92.1 lb-ft @4400 rpm, essentially as claimed by Aston Martin. The new high flow twin-tip system gave a power of 113.0 bhp @ 6115 rpm and a torque of 102.0 lb-ft @ 4401 rpm. This is an increase of 15 bhp and 10 lb-ft, which is greater than claimed for remapping the ECU. Return to KM12ZSZ.

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