MUffler

[vinj]

Years ago, i'd regularly hear a tuned boxer engine in our neighborhood from a block away. Sadly, that same vehicle was involved in a fatal accident.

kawawa naman kami with old cars

btw, our stock exhaust system were designed by manufacturer to cut cost only, wala kinalaman sa performance. kaya meron mga aftermarket system na designed for performance na wala pakialam sa cost.

modifiying the exhaust system doesnt do much to an unmodifified engine, putting a 3" pipe with a fake tanabe muffler on a 1.3-1.6L will only annoy people..come on, we know whats under the hood....

I hold the same thoughts. With a typical old vehicle (let's say, a 90s 1.6L), there is more power and efficiency to be gained by ensuring the vehicle is properly tuned, and all components are functioning optimally (sensors, A/F, drivetrain, etc.) before looking at the bolt-ons.

If people start bringing up "how about a 4AGE, SR20?", etc. That's already a different discussion from the run-of-the-mill GAs, 4AFEs, SOHC VTEC, and similar mass-produced engines, as we are already talking about tuner oriented engines.

If you do upgrade, gains will also depend on how restrictive the stock system is as well; on a GA engined B14 Sentra many years ago, we tried using headers hooked up to the aftermarket exhaust system and there were no gains. We swapped the intake to a cold-air system and voila, it gained a better top-end - the problem was the restrictive intake system. In contrast, I've also seen aftermarket mano-mano exhaust systems even ruin a car's powerband (lost too much low and mid end to negate the top end gains) when the vehicle was hooked up on a dyno to verify the changes. SCC also did a test before: A stock GA16DE engine will put around 80+ hp at the wheels. Using a well-designed intake and exhaust system together with tuning will bring it up to around 105-110hp at the wheels (similar output to the HP at the crank), and this is with an engine that was known to have a restrictive intake and exhaust system (so it was an more of a outlier than the norm).