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Old 01-01-2010, 11:11 PM   #20 (permalink)
mcrews
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Join Date: Oct 2009
Location: Texas
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The Q Sold - '02 Infiniti Q45 Sport
90 day: 23.08 mpg (US)

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Quote:
Originally Posted by Domman56 View Post
No actually, If you delete the secondary cat .. Yes that will increase air pollution a bit however the resonator and muffler have nothing to do with your smog. you can run straight pipes all the way back from the cats (hypothetically speaking) and it'll still be as clean as through regular mufflers. your cats do make the car cleaner however so if you're concerned about polluthion then don't delete the secondaries
PLEASE!!!!
don't make recommendations that have ABSOLUTELY no validation or proof behind them.
Straight pipes!!!!! no!!!!!!
this isn't some pos American under engineered car. There is a symmetry and balance to top end cars. THese manufacturers (MB, BMW, Lexus, Infiniti, Audi) don't just throw the lowest common part on and say '''ok, that kinda works". FACT: on both the INFINITI Q45/M45 forums NOONE has successfully used a CAI or K&N filter. Why? because some much engineering went into the V4K.5L and the two cars. FACT: while several have added aftermarket exhaust (cat back) NONE have claimed better performance in HP or MPG only that they like the new sound or like the new look.
FACT: the VK4.5L (in 2002) made 340 hp. that is a 272 cubic inch V8
compare: Chevy corvette 5.7 L (2004) made 350 hp that is 350 c.i.
Ford Mustang 4.6l (2002) made 252 hp that is 280 cubic inches.
I realize this is a public forum and you are entitled to your opinion BUT you are not entitled to make flippant and random recommendations

Please re-read the post that Christ made to you concerning the difference between FACTS and random unsubstantiated claims. AND UNTIL YOU RUN AN A-B-A TEST on your own personal mods DO NOT RECCOMEND THEM.
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