Maruti Suzuki India Ltd on Tuesday, reported a 26.4 percent year-on-year decline in consolidated net profit to Rs 2,466.1 crore for the fiscal second quarter, despite a 26 percent increase in revenue from operations to Rs 53,355.5 crore. The country's largest passenger carmaker reported record quarterly sales volumes, but profitability was hit by higher commodity costs linked to the West Asia conflict and mark-to-market losses on invested surplus, the company said in a stock exchange filing.