In Towamencin Township, PA 63 widens to four lanes and is called Sumneytown Pike again, passing woods and development before reaching an interchange with I-476 (Pennsylvania Turnpike Northeast Extension). The I-476 interchange includes full access via a ramp passing through the toll plaza along with additional E-ZPass-only ramps to southbound I-476 and from northbound I-476. Southeast of I-476, the route enters a commercial area in the community of Kulpsville, where PA 63 turns northeast onto Forty Foot Road, a five-lane road with a center left-turn lane. The highway passes through suburban areas, narrowing to three lanes before widening back to five lanes. Along this stretch, the route passes southeast of Dock Mennonite Academy before crossing Allentown Road. A short distance later, PA 63 turns southeast onto two-lane Welsh Road and Forty Foot Road continues northeast toward the borough of Hatfield as PA 463. Along Welsh Road, PA 63 forms the border between Hatfield Township to the northeast and Towamencin Township to the southwest. The road heads through residential neighborhoods.