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Originally Posted by SaskFr-s
What could I add to my TRD system. I figure there's no point in removing it since I already paid for it. And do you mean the K&N drop in filter? I read that the pulley added noticeable throttle response. But then again I enjoy mods that increase driveability over power. I'm all new to modding so thanks for the advice guys!
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TRD cat-back ? You could still add a catted front pipe and headers for more performance. Yeah most drop-in filters offer similar results. I would go with Perrin or similar.
I bought a Perrin pulley back in the day and never installed it. Glad I didn't because I heard countless stories of some not being installed properly, causing major potential problems. I'm sure it helps with throttle response though. There are a lot of people divided on this mod.
I would focus on more exhaust mods as mentioned earlier, also a tune via Ecutek or OFT and suspension mods like springs or coilovers. If you want more power, just go FI