exhaust

[Corey170]

my second muffler in my 89 240 (the one thats one up from the main muffler) has a couple decent sized holes in it. I am unsure how much this is affecting my performance and also unsure what to do about it. should i patch it up? or possibly buy a new part? or maybe just go big and get an entire new exhaust system for my car. also the car rattles at low rpm (idle); could this be the muffler/exhaust as well?

[93-240SX-COUPE]

One of the easiest and best upgrades you can do to the 240 is get a new exhaust. The factory exhaust system is very restricitve and definetly gives less performance compared to an aftermarket exhaust.

[Corey170]

about how many horses would i expect from new exhuast? just catback say? also taking into account the fact that i have holes in my muffler right now

[93-240SX-COUPE]

i think over the stock exhaust on a ka24de a good exhaust will give about 5-7 hp, nothing crazy somewhere in that range. u should notice about a 10hp difference since u are losing over stock right now.

..and catback is the preferred exhaust, its def better than stock and better than axle back.

[Corey170]

Ok thanks. Would it be much use to get a new manifold as well? like is it worth the work and money? and also how difficult is it to install catback exhaust? should i be getting a professional to do it or is it a good D.I.Y. candidate?

[93-240SX-COUPE]

well unless u go turbo, u dont have a manifold. im assuming u mean header.

obviously an aftermarket header will give performance increase. anything that helps the car breathe better is gonna make a performance increase: intake/header/exhaust

i think a good header will give about 3-5 hp. i think last i heard hot shot has the best dyno proven header (not carb legal, i live in cali so i know). I think headers are a lot more work to install but most give instructions on how to install, if not check the web, someone has a header install diagram.

Is it worth the money? Well thats up to u. Ur gonna pay about 300-500 on the header and so ur looking at about 100/hp and thats about right for bolt ons. (For comparison, an intake cost about 200 for about 3-4 so thats about 50/hp)

Exhaust install is fairly easy if u have a jack and four stands. should take u about1-2 hours if ur not used to doing it.

[Corey170]

sounds good. well thanx alot im gonna look more into it next month. happy holidays.