The largest prime factor of an irreducible cubic polynomial

Heath-Brown proved that for a positive proportion of integers $n$, $n^3+2$ has a prime factor larger than $n^{1+c}$ with $c={10}^{-303}$. We generalize this result to arbitrary monic irreducible cubic polynomial of $\mathbb{Z}[x]$ with $c$ replaced by an exponent $c_p$ dependent on the polynomial.