GMT400 (1988–1998) – OBS Discussions Performance, Mods & Tuning
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About the Performance, Mods & Tuning category
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0 | 11 | February 10, 2026 |
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TBI to Vortec Swap Guide for GMT400 Trucks
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0 | 24 | April 14, 2026 |
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GMT400 Diesel Swap – 6.5 vs Cummins Conversion
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0 | 18 | April 12, 2026 |
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Best Cam for Stock 5.7 TBI – Power Gains on a Budget
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0 | 17 | April 12, 2026 |
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4L60E to 4L80E Swap in GMT400 – Is It Worth It?
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0 | 12 | April 12, 2026 |
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5.7 TBI to Vortec Swap – What Fits in a GMT400?
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0 | 7 | April 12, 2026 |
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LS Swap into GMT400 – Best Engine Mounts & Crossmember
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0 | 24 | April 12, 2026 |
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Best Exhaust Setups for GMT400 (Sound + Performance)
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0 | 16 | April 8, 2026 |
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How to wake up a stock GMT400 5.7L without breaking it
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0 | 16 | April 8, 2026 |