As expected, the 4-into-1 header offered the highest peak power, measuring in at 204 hp. Interestingly enough, the 4-into-1 offered the highest peak torque reading as well, measuring in at 143 lb-ft. The high-rpm improvement was accompanied with a slight penalty in midrange performance.As expected, the 4-into-1 header offered the highest peak power, measuring in at 204 hp. I Dyno Data: Stock vs. Tri-Y 4-Into-1 (Horsepower) RPM STOCK TRI-Y 4:1 4,000 84 84 85 4,500 101 101 101 5,000 115 116 114 5,500 137 138 134 6,000 150 151 150 6,500 165 167 167 7,000 181 184 185 7,200 191 193 196 7,500 194 199 202 7,700 195 201 204 8,000 191 196 198 8,500 186 192 193 CONNECT Airmass (A Division Of Holley) « | 1 | 2 | 3 | 4 | View Full Article By Richard Holdener Enjoyed this Post? Subscribe to our RSS Feed, or use your favorite social media to recommend us to friends and colleagues!
