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<blockquote data-quote="GR8WHITE" data-source="post: 148778" data-attributes="member: 39"><p>With the cutouts and an OR pipe you will loose some HP and TQ. Mikie2001GT (now EviLS1) did the same to his 2001GT. On the dyno he lost almost 40 HP and TQ. I doubt it would be that big of a loss on a NA Cobra. However, I think it would still take away from the cars performance. With our small displacement engines, we require some backpressure in naturally aspirated street trim.</p><p></p><p> The problem with the flow is that it moves the power band further up the RPM scale. By doing a little you might loose a touch of down low TQ but gain middle and upper rpm HP and TQ. The big problem comes in when the exhaust is completely open with the stock cams. Often times it will shift the power band out of the cam profile, thus actually loosing HP. A different cam profile (.510ish lift and .210ish duration or there about) would really wake the car up with the free flowing exhaust combo you mentioned.</p></blockquote><p></p>
[QUOTE="GR8WHITE, post: 148778, member: 39"] With the cutouts and an OR pipe you will loose some HP and TQ. Mikie2001GT (now EviLS1) did the same to his 2001GT. On the dyno he lost almost 40 HP and TQ. I doubt it would be that big of a loss on a NA Cobra. However, I think it would still take away from the cars performance. With our small displacement engines, we require some backpressure in naturally aspirated street trim. The problem with the flow is that it moves the power band further up the RPM scale. By doing a little you might loose a touch of down low TQ but gain middle and upper rpm HP and TQ. The big problem comes in when the exhaust is completely open with the stock cams. Often times it will shift the power band out of the cam profile, thus actually loosing HP. A different cam profile (.510ish lift and .210ish duration or there about) would really wake the car up with the free flowing exhaust combo you mentioned. [/QUOTE]
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