Cylinder head & intake work + high flow throttle body & performance exhaust recommended. Shines in 124 + cubic inch engines with added compression.
Easier to tune, better street manners & revs up higher than the 508. Shines in 114 and larger engines with increased compression. The 508 revs up faster than the 521 grind, sounds nastier and pulls harder out of the hole. Shines in 114 + cubic inch engines with added compression. Responds very well to increased bore and or compression Great bottom end with substantial gains above 2,800 RPM when compared to stock. Great all around camshaft, Feuling's go to for 4 1/2 stroke 114" & 117" looking for a little more than our 465 grind. Responds well to increased bore and or compressionīolt-in. Solid bottom end with substantial gains above 2,800 RPM when compared to stock. Best all around camshaft, Feuling's go to especially in 4 3/8 stroke. Will respond well with slip-on mufflers and a high flow air cleaner.īolt-in.
Wide powerband throughout the entire RPM range when compared to stock. Requires high lift valve springs.īolt in. Requires high lift valve springs.Įye blurring mid and top end power. Will respond well to ported heads and open intake. Works best with larger displacement engines and added compression. Go to bolt in camshaft for 110 engines.įreight train pulling power. Respondes well to head work and increased compression. Wicked power band for 103 and larger engines. An Excellent compromise between the 525 and 574 achieving the best all around performance. Producing strong low and mid range power.
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