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Compare the 5 best Polaris Slingshot audio and subwoofer upgrades from DS18: rear sub boxes, under-dash subs, headres...

Compare the 5 best long-tube headers for the 5.7 & 6.4L Hemi Charger, Challenger & 300C. Real dyno HP gains, ...

The Injector Dynamics ID1050X flows 1,065 cc/min for the Toyota 4.0L 1GR-FE V6 in the 4Runner, FJ Cruiser, and Tundra...

Best audio upgrade for your 2024+ Jeep Wrangler JL & Gladiator JT: compare a plug-and-play DS18 soundbar, 600W su...

Compare the best 5.7L HEMI camshafts for 2003-2008 Dodge, Chrysler and Jeep. Real cam specs, HP gains and bolt-in ins...

Compare the best headers for the 1996-2004 Mustang GT 4.6L 2V: BBK long-tube vs shorty, RWHP gains, plus X-pipe and c...

Compare the best tonneau covers for the 2022 Hyundai Santa Cruz: Access TonnoSport vs LOMAX Stance. Specs, fit, and p...

Compare the best 4-inch exhaust systems and downpipes for 1989-1993 Dodge 5.9L Cummins. Real EGT gains, specs, and pr...

Compare the best front suspension upgrades for the 98-07 Land Cruiser & LX470: offset upper control arms, camber ...

Compare the 5 best exhaust systems for 1997-2004 C5 Corvette - Borla, MagnaFlow and Kooks. Sound levels, specs, and p...

Compare the 5 best cold air intakes for the 2012-2015 Jeep Wrangler JK 3.6L. Real dyno gains, oiled vs dry filters, a...

Compare the 5 best audio upgrades for the 2018-2023 Jeep Wrangler JL & Gladiator JT: DS18 soundbars, dash pods &a...